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  1. Point masses in GR
  2. Should spacetime transformations make a group?
  3. Question about "A Calorimetric Test of Special Relativity"
  4. bizarre coincidence with Huble Shift and Planck seconds?
  5. Why light?
  6. Expansion of Universe and Time dilation
  7. electron and photons time of flight
  8. Lorentz transformation without the speed of light postulate
  9. How does gravity work?
  10. big bang theory
  11. The Twin Paradox
  12. Why not length contraction?
  13. Einstien's original papers
  14. Minkowski metric
  15. The difference between a metric and the metric tensor
  16. relativity in 2 spatial dimensions
  17. The show of the duel
  18. Event Horizon
  19. Gravity Deflecting Light and Gravity Lensing
  20. Time Dilation....what it means
  21. Moving through Space-Time
  22. Are the formulas that account for aberraion and doppler shift compatible?
  23. Webliography: What is the experimental basis of Special Relativity?
  24. Palatini formalism
  25. combining SR and GR time dilation
  26. Stress energy tensor interpretation
  27. Moving At Light Speed
  28. Anti-Mass and Speed of Light
  29. The Theory of Everything
  30. Train Experiment in Rotation
  31. Length Contraction Evidence?
  32. How come equations don't account for....
  33. How do we know that the stress-energy is a tensor?
  34. Benefits of time dilation / length contraction pairing?
  35. Black holes and gravitons
  36. Time Shift in Wormholes
  37. speed of light constant throughout universe?
  38. Speed Of Light Experiment
  39. What caused time to run slower in a field of gravity
  40. Center of Krunskl Szekeres coordinate
  41. Constant Motion being relative leaves me with a paradox. I must me missing something,
  42. Mass photon
  43. Were some of Einstein's thought experiments carried out later?
  44. In which areas of physics is relativistic mass used?
  45. Question about C and Mass
  46. gravity at very large distance
  47. light <--> mass attraction
  48. Frequent flyer miles for the travelling twin
  49. A baffling quote from Einstein, badly requiring explanation
  50. Tell me what I'm doing wrong (velocity addition in 3+1 dimensions)
  51. Faster than Light Question
  52. time question
  53. Christofel Symbols Tensors?
  54. absolute movement
  55. Einsteins General Relativity Papers- Original
  56. Space and Time
  57. Question about applying the Lorentz Transformation to velocity 4-vectors
  58. Rotating rigid sphere stress-energy tensor
  59. Time dilation
  60. Does space warp reduce the space volume?
  61. Riemann geometry and hydrostatic
  62. can information be transmitted faster than c in inflationary cosmology?
  63. Relativity of simultaneity explained
  64. Disk Rotating Near the Speed of Light
  65. Object falling from rest
  66. Speed of light, mass equation
  67. Faster than light media
  68. The speed of light and gravity
  69. Why does matter even bother?
  70. How mass and time are defined
  71. Gravity and time
  72. constantly accelerating object and its proper time
  73. Mass of fuel would ALSO increase as spaceship comes near the speed of light!
  74. Naive Mass of Photon Question
  75. In twin paradox, Please Help
  76. Relativistic Center of Mass ?
  77. Hypothetically If you were in a spaceship going 0.99999999999...c and you tried......
  78. Time dilation ll
  79. pls help me dissect e=mc^2
  80. the doppler effect on light (red and blue shifts)
  81. I'm confused as to why you can't go faster than light, if you compound velocities
  82. Does time exist without mass?
  83. using einstein field equation
  84. Endless acceleration
  85. What does E=mc^2 mean?
  86. Length contraction
  87. Black Hole Gravity
  88. Gravity and Pressure
  89. The source of gravitational red shift
  90. Math of relativistic space travel
  91. where does space end
  92. Curved Spacetime and Gravity
  93. Can you answer these?
  94. Proper time of an accelerating particle
  95. Ultimate speed limit
  96. Speed of gravity waves
  97. Null coordinates
  98. Lorentz generators
  99. Modificaition in pole and barn paradox
  100. How do you tell you are not in inertial frame of reference
  101. Basic question about speed of light situation
  102. time dilation: most recent & precise experiments
  103. Minkowski Space with object
  104. Lightspeed wave lenghts
  105. Lorentz Transforms + Relativity of Simultaneity
  106. Significance of Special Relativity
  107. 'Poking' the Event Horizon
  108. Curvature using exterior differential forms
  109. change of basis for a metric
  110. Relativistic version of 2nd law of thermodynamics
  111. Does time exist apart from matter?
  112. Does the CMB allow special rest frames to be defined?
  113. Zero connection => Zero torsion tensor ?
  114. Help: Mode Decomposition and Retarded Feilds and Green's functions
  115. problems I have with time.
  116. moving light bulb sphere of photons
  117. Length contraction 2
  118. energy in different frames.
  119. Quantum mechanics vs. postulates of special relativity
  120. Composition of Lorentz pure rotations
  121. Simultaneity - Albert Einstein and the Theory of Relativity
  122. Why does light fall?
  123. Ether and how it was disproved.
  124. Black Holes and Gravitational Waves
  125. Can the gravitational field create its own gravity?
  126. time question
  127. Helium-3
  128. GR - time dialation at center of a planet
  129. General relativity
  130. My little theory: what would happen?
  131. Just a quick question...
  132. What Keeps A Black Hole Going?
  133. An array of lightclocks
  134. The Hilbert Action
  135. d'Inverno page 226 (tidal force on freely falling particle )
  136. doppler effect for light wave
  137. General Relativity vs. gravitons/force
  138. How does empty space curve?
  139. Future Without Present? If the event at "present" of light cone is missing will....
  140. question on gravitational time dilation...
  141. einstein's train/embankment thought experiment as an example of backward causation...
  142. The Alcubierre Drive and Negative Energy
  143. foliating spacetime
  144. A question on velocity addition
  145. could GR generalized to non-integer dimension??
  146. Gravitational Time Dilation
  147. Parametric Equation of a Sphere in General relativity...
  148. Tidal forces around BH
  149. clarification on length contraction
  150. After finding the Einstein Tensor...
  151. Relativistic motion of a magnetic sail
  152. Gravity & General Relativity
  153. Schwarzschild's radius inquiry
  154. free falling & geodesics
  155. Is there inertial mass-gravity equivalece principle with photons?
  156. synch clocks
  157. Help with SRT and Maxwell
  158. evaporating BH and infalling observers - I am puzzed
  159. What would a time machine look like?
  160. Does matter warp space time in the form of minimal surfaces?
  161. Can physical 3D space exist at all?
  162. Higgs and relativity?
  163. Passing the speed of light
  164. Speed of light, propellent incease in mass?
  165. Time Travel (view point of a non-scientist)
  166. Degrees of freedom in the curvature tensor
  167. Four-momentum of a photon
  168. Is spacetime really curved?
  169. Gravitational lensing - 2 questions
  170. Gravitomangetic B-field units
  171. simultaneous paradox
  172. Breaking the speed of light?
  173. Gravitational Time Dilation & Blueshift
  174. Time dilation #3
  175. Refraction and Special Realitivity
  176. Clocks and boxcars
  177. Density Increasing
  178. Some questions,espacielly about time
  179. Difference between Invariance and Covariance
  180. Specific Solution in GR
  181. Large bodies of mass and their effects on apparent time
  182. Why would an infinite universe tend to contract?
  183. The Present Moment in Spacetime?
  184. How is it that black holes are black?
  185. Black Hole Thermodynamics Resources?
  186. So what if I was in motion and tried to measure my own mass?
  187. light spheres
  188. i need help understanding this stuff
  189. speed of light and mass increase
  190. Fundamental c
  191. Velocity of the Earth
  192. Equivalence Principle & Gravitational Time Dilation
  193. NM's for Wormholes
  194. Relative motion of C on C formula
  195. Photon energies relative to movement, and relativistic mass Q's.
  196. Centrifugal force around planets
  197. Geometrized Units
  198. Frames of reference?
  199. Gravitational acceleration in GR
  200. Is Light Constant in GR
  201. Gravitational Time Dilation - Confused
  202. Physics Emergency!
  203. Proof of relativity
  204. Faster than light
  205. Is this an example of Relativity?
  206. Christoffel symbols etc. via Lagrangian
  207. Are black holes bosons or fermions?
  208. How does gravity tend to propagate?
  209. Bent space
  210. Why is the speed of light restricted?
  211. Event Horizons / Time Dilation
  212. Is each level of a group of systems representative of gravitational time dilation?
  213. Time dilation... but for who??
  214. Your favourite gedanken?
  215. Raising indices in curved space
  216. Gamma-Ray Burst (GRB)
  217. a copernicus/relativity question
  218. tensors versus differential forms
  219. Coordinate independence
  220. There is no "Transverse Gravitatonal Redshift"
  221. Philosophic comments on time in Relativity.
  222. So what's next for Einstein's Relativity?
  223. Gravitational blueshift and a Moving Mass
  224. Escaping a black hole
  225. Epsilon-delta?
  226. Mass (both relativistic and rest) of a photon
  227. Can general relativity derive from superstring theory?
  228. Time Dilation and Gravity's Effect on Light
  229. Energy & momentum in non-Minkowski coordinates
  230. Bending of space
  231. Potential Energy and energy conservation in General Relativity
  232. Twin Paradox- a quick(ish) question
  233. Question Regarding Electromagnetic Fields in Special Relativity
  234. Relativistic Energy of Antimatter
  235. Conceptual Question about the Change in Mass
  236. Transient mass fluctuations
  237. Centripetal thrust need at high-speed
  238. Coriolis effect and relativity
  239. Getting stuff out of a black hole using a second one
  240. gravitation/general relativity (minus math)
  241. Cosmological Constant and the Colapse of the Universe
  242. Path of an object
  243. Our light cone was a black hole
  244. connection between fabric of space, max. speed (of light) and time dilation
  245. The doppler radar trap paradox on the path to gravity.
  246. Superman's Helicopter
  247. Time dilation and gravitational constant
  248. Adding momentum in STR and DSR?
  249. Where is a light year inside the earth?
  250. Photons, gravity, and the bending of light.
  251. Summation convention and index placement
  252. Gravitational redshift and black holes
  253. Can photons create their own gravity?
  254. On pressure inside a stellar body - relativistically
  255. Can we predict which reference frame is correct?
  256. beginner needs answers to basic questions about the speed of light
  257. High relativistic speed + entanglement
  258. 4-velocity
  259. Acceleration and twin paradox question
  260. Gravity question: Why do things fall?
  261. Does a black hole have "shape?"
  262. Speed of Light Always The Same?
  263. Hawking radiation: why only one way?
  264. 1st Law of Black Hole Mechanics
  265. time:magnitude and direction?
  266. simultenaity
  267. Is there a Space-Time Curvature equation?
  268. how to draw a spacetime diagram
  269. Circling spaceship
  270. Causal set theory
  271. Why is faster than light travel so bizarrely 'addressed'
  272. What would it actually look like?
  273. Special relativity and Earth in context to a stationary point
  274. Relativity-I think!!
  275. how long would it take?
  276. How are gauge transformations linked to degrees of freedom?
  277. closed timelike curves
  278. Tensor index exercises
  279. Getting to the speed of light
  280. Will our sun become black hole if it were moving fast enough?
  281. Speed of light spacecraft
  282. Polarization vectors
  283. Using a computer to calculate Einstein tensor etc.
  284. How time Travel work ????
  285. Beginner's question on bending of space time and measuring distance to stars
  286. The "Photon's Perspective" Taboo
  287. How do you prove that the speed of light is absolute
  288. coupled nonlinear partial differential equations or simple matrices?
  289. Illustrations
  290. Quantum Gravity
  291. Can't get time dilation to add up
  292. which Book for Pauli-Fiertz langrangian
  293. de Sitter space
  294. Reduced density matrices and Lorentz transformation
  295. Kaluza-Klein primer
  296. Matrix equation in SL(2,C)
  297. E=mc2
  298. Detection of Gravitational Waves
  299. relativity of distances/lengths
  300. Time travel
  301. How fast to go 1000 years into the future
  302. Does spacetime curvature of EM field affect zero-charge particles?
  303. Interpretation of spacetime diagrams.
  304. Axxis moving parallel to another
  305. Close to light speed visualization question
  306. Time limit
  307. DeBroglie and Time Dilation Paradox
  308. Superman time travel
  309. History of Gravity
  310. Free-falling vs Fermi-Walker
  311. Are proper travel distances contracted by SR?
  312. 2D Null Geodesic Solution
  313. Question about SR and increasing mass
  314. Feynman's perihelion of mercury calculation using field theory
  315. Giving a lecture...
  316. Doppler Effect on Light
  317. Spacetime Translational Invariance vs(?) Lorentz Covariance
  318. relative perspective
  319. mass + potential kinetic energy
  320. Light speed laser pointer war
  321. Tricky Pauli matrices
  322. KE and relativity
  323. Black Holes and Relativity
  324. Gravity Wave & Light Wave Journeys
  325. constant velocity vs accelerating source
  326. Difference in age ??
  327. Confused in a thought-experiment...
  328. need help understanding an equation
  329. Large Scale Structure of Spacetime Study Group
  330. Velocity addition formula
  331. Is the behavior of light that remarkable?
  332. most basic of thought experiments in special relativity
  333. Relativistic Mass and Energy Convservation
  334. seconds passed
  335. Time
  336. Send Particle Backwards in Time - Is this a hoax?
  337. Effect before Cause:absolute horizon
  338. Neutron Stars and Special Relativity
  339. EPR Paradox and implications for QM
  340. Insight
  341. Einstein field equations (EFE's)
  342. Question about gravity
  343. How does time dilation really work?
  344. Affine parameter along a geodesic
  345. Administrative suggestion
  346. cosmological constant
  347. Help with a really nerdy calculation?
  348. proper time
  349. The beautiful sight of the interstellar traveller
  350. Length EXPANSION?!!!
  351. Photon/particle's energy in General Relativity
  352. SR & the empty FRW model
  353. Role of Exclusion principle in formation of black holes.
  354. Lorentz Contraction of a Moving Parabola
  355. Faster than the speed of light with only a fishing line!
  356. A different take on the Schwarzschild Metric
  357. Invariance of E and B
  358. Unbound and unstable orbits
  359. Spatial curvature in Schwarzschild & FRW
  360. Is the speed of light a velocity or acceleration?
  361. Breaking Light and Einstein-Rosen Bridges?
  362. Vectors and the Speed of Light?
  363. Metric tensor definition
  364. am i moving
  365. Help! My Brain is Melting!
  366. Confusion
  367. problem with constant C
  368. A dark part of special relativity(at least for me)
  369. why isn't gravity the result of a variable speed of light?
  370. Twin paradox
  371. A question about special relativity, Please Help
  372. Electromagnetic General Relativity
  373. radius of the accretion disc?
  374. Length contraction?
  375. What exactly is meant when people say that a Light Cone is "tilting"?
  376. Principle of Relativity and Constancy of Light
  377. Ether
  378. The Relativity of Simultaneity
  379. Total energy at zero rest mass
  380. Do photons age?
  381. Is there time at the speed of light?
  382. Time Travel Theory
  383. Twistors
  384. Hubble Effect
  385. Kretschmann Scalar
  386. Kerr metric, singularities in Boyer-Lindquist and Cartesian coordinates
  387. Help me understand the twin rocket experiment
  388. Magnetic relativity
  389. Length contraction: a question about tramwheels
  390. A little paradox in relativity.
  391. Derivation of Wormhole Mouth Mass/Charge?
  392. [help]how to obtain gravity eqution from gravity field Action S?
  393. Black Hole Horizon Information
  394. A few "paradoxes" in STR
  395. Falling down an infinitely deep well
  396. A thing that confuses me (quasi-paradox)
  397. Accelerated twin is OLDER?
  398. Hyperbolic angle
  399. What light does
  400. The God Photon
  401. Our past is not our past?
  402. Is speed of time c, atleast for someone travelling at speed of light?
  403. Gravity distorts space-time?
  404. Verify special relativity by concept "light clock"
  405. Time and Space
  406. the principle of relativity
  407. Compact Sapcetime and Time Travel
  408. Postulate 2
  409. the gravitational redshift
  410. Does an observer on a carousel see a horizon?
  411. Horizon for Contant Acceleration
  412. Blackhole Escape Velocity
  413. Where does gravity pull?
  414. Superluminal velocities & redshift
  415. Gravity: Time Dilation or Death
  416. Special relativity
  417. speed of time?
  418. Redshift of Sound in a Gravitational Field
  419. Problems with scale
  420. special relativity
  421. Capacitor paradox
  422. Wormole and reactionless drive
  423. Twin Paradox (I know...not again)
  424. Mass vs Gravity
  425. mass warping time, question/ interpretation
  426. Speedy ship flies through the sun
  427. Penrose Diagram
  428. relativity
  429. The trivial constant force acceleration math
  430. Conceptual GR question (regarding orbit paths)
  431. Time Dilation, who is aging slower?
  432. Special Relativity Time Travel to Future - Could You Watch the News on Earth?
  433. Confused about Equivalence Principle
  434. Electromagnetic version of the positive energy theorem?
  435. Behavior of a tangent light beam to an event horizon?
  436. Mass energy equivalence
  437. Lorentz transformations derived using dimensional analysis?
  438. Tesnsors and Units Consistancy
  439. Mass due to velocity
  440. Does time speed up as space expands
  441. Time dilation effects on spinning object
  442. Relativity Theory and Quantum Theory
  443. White Holes question
  444. what are the implication of einstein's definition of space time?
  445. What is Feynman's excess radius for a black hole?
  446. gravitons and warping
  447. Special Relativity Basics
  448. Unification of Gravity versus General Relativity -- The Ubiquity of Contradiction
  449. Riemann curvature tensor and nonlinear operator
  450. Simultaneity, does it confuse causality?
  451. When does Newton's Gravitation fail us?
  452. Understanding Einstein's Twin Paradox, past the usual level?
  453. two spaceships that pass in the night
  454. Trouble understanding gravity
  455. Electric is Magnetic - Relativistically speaking
  456. Gravity in relativity.
  457. SR and classical Doppler shift
  458. increasing mass approachng c.
  459. Mass inside a black hole
  460. Problem with Rubber and Metal Ball Analogy
  461. Earths rotation and special relativity
  462. gravimagetism motor!
  463. The visible universe and the speed of light
  464. Speed increases mass, which increases gravity?
  465. Local inertial frame
  466. Time travel.
  467. Why there can be only one invariant speed
  468. Functionals
  469. Crossing event horizon and Hawking radiation
  470. blueshift
  471. Ampere from SRT again
  472. question about the effect of c on light
  473. Question about light clock.
  474. Lorentz Generators, Srednicki eq. 2.13
  475. Schwarzschild Metric: The Sun
  476. The metric tensor
  477. What sort of "vector" is this?
  478. moving emitter
  479. Cosmological Constant and Planck Length in relativity
  480. a few questions on time
  481. Question about 'uniform' pseudo-field felt by accelerating observer
  482. .99c
  483. Relativistic Angular Momentum?
  484. GR: body at rest
  485. Lengths perpendicular to relative motion are unchanged
  486. Information loss via black Holes
  487. c
  488. Getting the Ricci and metric tensor from T ?
  489. Einstein on the relativity of distance.
  490. Can gravitational blue shift happen without gravitational time dilation?
  491. why cant special reletivity and newtonian theory of gravity agree?
  492. Apparent paradox: e=mc^2 violates conservation of energy?
  493. Does J go to inf when v goes to c?
  494. is equivalence principal really true?
  495. What does it mean if a transformation is 'linear'?
  496. Question on linearity of Lorentz transformations
  497. addition of velocities
  498. .5 c
  499. Confusions over general relitivity
  500. Minimum travel time
  501. Perception vs. Reality-relativity of time
  502. acceleration
  503. Simply Connected Universe/Poincare Conjecture Question
  504. The danger of FTL?
  505. Energy, Mass and Frames
  506. Lorentz Transformation
  507. Questions!!!!
  508. Some Questions on Time Dilation.
  509. Is newton's 3rd law wrong?
  510. Why is the speed of light... erm... the speed of light?
  511. Killing vectors for Anti desitter space in 3+1
  512. E=m
  513. Special relativity and acceleration
  514. How does mass know that space is curved?
  515. the Einstein equation
  516. acceleration in relativity
  517. How does the GR field equation reduce to Newton's law of gravity?
  518. rubber sheet analogy - density change
  519. Is there any derivation of length contraction through proper lenght?
  520. Alpha centuri.....4 light year relative to who?
  521. how can two objects colliding and merging have a bigger mass?
  522. TWIN PARADOX-What's that??
  523. Momentum in SR
  524. Thought experiment concerning worldlines
  525. Simulating relativity in a velocity verlet algorithm
  526. My twin galaxy puzzle! Please help
  527. Overview of the topic and current topics/unsolved problems
  528. Published definitions of rapidity
  529. acceleration due to gravity
  530. Faster than light
  531. Black Hole; Gravity & Speed Within Questions
  532. Bell's spaceship paradox --- reversed
  533. Special relativity missunderstood
  534. "Swimming" in space-time
  535. SR effects at the center of a planet
  536. Switching from pressure to energy density on a stress energy tensor
  537. Can someone explain time dilation w.r.t following experiment?
  538. What is "gauge" in General Relativity?
  539. Gravitational Field & Reference Frames
  540. Is mass creating time?
  541. Gravity
  542. Thermodynamics of Spacetime: The Einstein Equation of State?
  543. Beginner's Minkowski diagram / space-time interval question
  544. what came first Gravity or Curvature
  545. confusion is speed of light
  546. Evidence for infinites at light speed.
  547. Christoffel Symbols for Schwarzschild Metric (?)
  548. Div curl black holes
  549. confusion between simultanety and time dialation
  550. orthonormal basis in fermi coordinates
  551. What if light clock experiment was done on top of train?
  552. No SR time dilation without Lorentz contraction
  553. Trying to follow i "beginer's" proof/derivation from relativity demistified.
  554. Curvature of spacetime, Matter vs Energy
  555. Gravitational Redshift for Photon around Kerr Black Hole
  556. Is gravity a force, or curvature of space-time?
  557. From where comes Gravity energy?
  558. Interpretation of Flamm Paraboloid
  559. Does the curvature of SpaceTime Disprove gravity?
  560. Time dilation for clock thrown up and caught back
  561. what are the meanings of coordinates ?
  562. Twin paradox in Big Crunch
  563. Please show me my error
  564. Question on Light speed
  565. Acceleration & Mass relationship
  566. Magnetism and Relativity
  567. Question about black holes
  568. Time Dilation From Velocity
  569. Help me understand SR
  570. F.O.R. and Acceleration/Deceleration Question
  571. Rotating Charged Black-Hole?
  572. Very Long Distance Phone Call
  573. simple time theory questions
  574. Thought Experiment
  575. Constant acceleration rocket
  576. Eintein's theory of relativity
  577. length contraction in a current carrying wire?
  578. Relativistic mass,momentum and energy.
  579. gravitational collapse to form a black hole
  580. Gravity/Curved Spacetimes effect on Time
  581. Further from Earth...
  582. Can light speed be exceeded?
  583. Simultaneity in Relativity
  584. What happens when you enter a black hole
  585. Can I really not tell if I am in motion?
  586. c plus and ACAUSALITY in accelerating systems
  587. Is this explanation of E=mc^2 correct or incorrect and why?
  588. Why should the action be Lorentz invariant?
  589. Time 101
  590. Time dilation
  591. When adding up velocities, is it possible to produce 1+1=1?
  592. Apparent speed > c?
  593. Equivalence Principal, Acceleration, Curved Space
  594. Black Body in Motion
  595. Weak Equivalence Principle (WEP)
  596. time dilation
  597. Light and time travel
  598. Relative Acceleration Across a Potential Difference
  599. Is Action&Reaction Strictly Synchronous
  600. Acceleration in Born rigidity
  601. Special relativity fundamental question
  602. Is c invariant in Accelerating frames?
  603. Relative object speed question
  604. spacetime in a sphere
  605. Can SR and GR be combined.
  606. A question on photons
  607. Still learning about special relativity, need help.
  608. Confused by an example in Brian Greene's book and SR in general
  609. Relativistic effects on apparent angular size
  610. Velocity or Gravity creates mass?
  611. Extended coulomb´s law
  612. maxima question
  613. What do real physicists use
  614. General Relativity for Dummies
  615. Clock hands
  616. Einstein’s return to ether, what future of relativity?
  617. Some Burning Questions about Time Dilation
  618. Confused about Velocity Based Time Dilation
  619. michelson morley
  620. Simultaneity of events in 2 dimensions
  621. Is light speed faster coming from a smaller star?
  622. contravariant derivative
  623. Speed of gravity
  624. Can GR be formulated as background dependent?
  625. About how light clocks would work
  626. Lorentz factor semplification
  627. Spinning stick
  628. Is everything "else" blackhole?
  629. 5-Point Curvature Detector?
  630. Infinite mass = infinite gravity !?
  631. Schwarzschild Geometry
  632. Where does Carroll get eq. 4.64
  633. Travelling In A Straight Line In Space
  634. Itchy and Scratchy on a Train
  635. Time span or time flow
  636. help understanding special relativity concepts please.
  637. old question?
  638. The equivalence principle
  639. (absence of) temporal aberration: the most precise data?
  640. Help understanding e=mc^2
  641. Speed of Space-Time
  642. Is it realy true that nothing can travel faster than light? if so, why?
  643. How fast are we really moving?
  644. Are Lorentz transforms unique?
  645. Pauli's review article
  646. Dual of the inertial observer
  647. wigner rotation
  648. Geodesic and inertial frame
  649. SR question
  650. Question on Space time geometry
  651. better understanding of causality
  652. Is a falling elevator a valid inertial frame????
  653. Creating black holes through relative motion
  654. Structure of Minkowski Space
  655. mass in SR
  656. General Relativity and Minkowski space question
  657. Accelerating twin.
  658. Fermi normal coordinates
  659. Thought experiment: Orbiting bodies close to C
  660. shortening of spaceships
  661. General gravity wave question
  662. Another 'photon's reference frame' thread
  663. The Fourier-Minkowski transform?
  664. Absolute or relative TIME
  665. Why is the speed of light constant and independent from the observer?
  666. Space Time "Fabric" limit?
  667. A new interpretation of ether
  668. The vacuum Einstein equations and flat spacetime
  669. Conservation law at high speeds
  670. A thought experiment doubt on General Relativity.
  671. space-time fluid
  672. stress tensor
  673. The scaling of metric coefficients by changing units
  674. Speed of light dilated
  675. Speed of Gravity? Questions about the Kopeikin Experiment of Sept 8 2002
  676. STR 'rotation'.
  677. "You can't exceed the speed of light"
  678. Lorentz or Poincare invariant?
  679. covariant Green's function for wave equation
  680. Information content of the metric, Riemannian and Ricci tensors
  681. time travel when velocity> light speed
  682. Does the mass of a spring decreases if we compress it because we have stored energy?
  683. A thought Experiment on velocity greater than C
  684. Tension
  685. Inverse Square Law + Special Relativity
  686. GR correspondence to reality
  687. Planck units and relativity
  688. Having velocity of light is like having infinite Velocity!!!
  689. LHC particle mass increase
  690. Elegant Universe Example
  691. Suppose relative v in S <> -v in S'
  692. Velocity translating into weight?
  693. Decelerating from light speed
  694. How exactly to calculate the age difference in "Twin paradox"
  695. Proper acceleration question
  696. Just when I started to get things straught in my head.
  697. One-way speed of light
  698. Question on General Relativity
  699. How to judge the symmetry of spacetime?
  700. Black hole Questions
  701. Introduction to SR
  702. calculation involving angular momentum
  703. Observers at light speed
  704. Time dilation formula?
  705. black hole - contradiction to the Pauli exclusion principle?
  706. the change spatial distance between 2 events
  707. Challenge: superluminal average speed
  708. Time dilation in uniform field?
  709. Objects at the Speed of Light question
  710. So clocks in motion are 'slower' to observers in rest, shouldn't the clocks tick less
  711. Modified Car and ditch paradox!!!
  712. why lower index on components?
  713. Is there any difference left between time and space left?
  714. Negative time Minkowski metric
  715. What is happening when travelling towards light?
  716. Gravitational acceleration of relativistic objects.
  717. What does the travelling twin actually see?
  718. red shift and the train thought experiment
  719. Complex General Relativity
  720. the Greisen-Zatsepin-Kuzmin limit.
  721. lorentz transformations and the expansion of space
  722. Looking for a specific unusual solution to Einstein's field equations
  723. Are closed time like curves an inherent feature of rotating universe models?
  724. Einstein's use of ponderomotive force
  725. Gravitomagnetic waves?
  726. A Thought About LIGO
  727. I finally figured out how to ask my question
  728. Constant speed of light
  729. Minkowski vs deSitter: hyperbolic vs spherical?
  730. Are all time machines flawed?
  731. Is Distance/space Lorentz contracted?
  732. Pinhole Train
  733. Absolute Energy
  734. Why AND HOW could Time Slow DOWN?
  735. Invariant functions of the four-momenta
  736. Space-time diagrams
  737. Redshifting help?
  738. Beginner's Light Clock question
  739. Spatial curvature - effect on objects
  740. Who is in motion?
  741. Two Black Hole Questions
  742. Minkowski in 5-D: what is the fifth?
  743. Relativity on an Atomic Scale
  744. Length contraction falling down a hole.
  745. running away from a beam of light
  746. Relativistic paradox involving torsion.
  747. Can someone help a novice unbeliever?
  748. Deriving f(R) field equations
  749. Light Clock in a Gravity well ????
  750. Equivalence between a Black Hole and travelling at the speed of light
  751. Pair of moving charges -- confused
  752. Expansion of Space
  753. GR weak field approx. problem with Dunsby's notes
  754. a question about relativity
  755. Hawking radiation by the eyes of the falling observer.
  756. Length Contractions
  757. General relativity done another way?
  758. Thinking bout the Special Theory of Relativity
  759. Why is light travelling in "straight" line? (see restrictions)
  760. Constance of speed of light and refraction index question
  761. Transforming the electric field
  762. Universal cover of AdS
  763. Speeding black hole?
  764. Gravitational Force between Moving Bodies
  765. Speed of light and time
  766. example and question
  767. Fractal dimension of CMBR? Cluster distribution?
  768. Independent Components in Riemann-Christoffel Tensor
  769. Simple Question-I hope-difference between SP and GP
  770. speed of light question
  771. Time machine
  772. Physical meaning of tensor fields
  773. Collisions of particles
  774. Time Dilation-Frames-Details and hypotheticals
  775. How can light be a constant?
  776. What happens with a 'Light in a box theory'
  777. Why light speed is constant? (please read)
  778. Acceleration and velocity: newtonian versus relativistic interpretation.
  779. Is Ehrenfest paradox possible
  780. General Lorenz transformation is not group
  781. Confused
  782. Does Schwarzschild Solution work inside a massive body?
  783. Spacetime - formal description of No Rip/Tear
  784. Minkowski metric tensor computation
  785. Time Dilation Problem
  786. Particle bunching +Lorentz contraction
  787. SR and GR in a medium, gravitational waves
  788. Collapse of charged/rotating black hole
  789. Spacetime, curvature, orbit, matter and reactions
  790. The arrow of time
  791. why is energy the "time" counterpart of momentum
  792. is poincare group simply connected?
  793. Force & S.relativity
  794. what is galileian system of coordinate?
  795. Light Cone
  796. Is variation pricip for light-geodetic correct?
  797. How can black holes actually ever exist?
  798. Time and Space Continuums
  799. Time dilation
  800. Lorentz Transformation in New Coordinates
  801. The twins-some values.
  802. Time measuring in relativity
  803. Free Fall Acceleration to c
  804. Is there something behind a horizon?
  805. Sum of the angles in 4D coordinates system
  806. Confusion about relativity
  807. Michelson Morley revisited
  808. History of theories of motion; the role of inertia
  809. How is singularity formed inside a black hole?
  810. Does forces travel faster than speed of light?
  811. What is the metric in DSR ??
  812. Time travel and space travel
  813. Travel in space to Alpha Centuri
  814. Maxima software for use in GR
  815. Inverse Funcation of Relativistic mass
  816. Question about the limit of velocity as a moving mass is converted to kinetic energy
  817. Electromagnetic field in a medium
  818. Help me to Understand: I am traveling at 90% of the speed of light.
  819. about LTB metric
  820. Curved space?
  821. Curved Space
  822. Equation with Riemann curvature tensor
  823. time dilation b/c of Gravitaional field strength
  824. derivation help
  825. Combining Time Dilation from velocity and gravity
  826. Travel to Parallel Universes
  827. Graviton
  828. How we compute killing vector for two-sphere
  829. Black Holes Relation To "Time"
  830. parallel parallels
  831. Topology in GR
  832. One-forms and vectors
  833. General & Special Relativity, Everyday Examples
  834. Trying to generally understand Relativity.
  835. Strong Equivalence Principle
  836. Mass/energy as a "condition of spacetime"
  837. brane world
  838. Mass and the interval metric
  839. Question about how the speed of light is constant
  840. Relativistic particle scattering
  841. How to accelerate time?
  842. uniformity of universe expansion
  843. Gravitational mass vs inertial mass
  844. Time in a black hole and Weyl curvature
  845. tunneling does not carry information > c?
  846. Extreme relativity question
  847. Constraints on speed of light?
  848. Constant Velocity Motion In Train Car
  849. Dual basis in Minkowski space
  850. Final Clarification
  851. Why does a photon have zero rest mass?
  852. Creating Repulsive and Attractive Gravity
  853. Is it technically correct to say matter is made of energy
  854. Time Dilation and Future Interstellar Travel
  855. Scaling Paradox.
  856. Problem with four vectors
  857. New Image from Chandra X Ray Observatory
  858. Aging during space travel
  859. What are the weaknesses of Einstein's GR ?
  860. Gravitational potential energy in GR
  861. Does Einstein implicitly proves himself and the Lorentz Transformation wrong?
  862. spaceships at right angles
  863. Gravitational effects on photons
  864. Definition of energy in general relativity
  865. waves in a vacum
  866. Time dilation at an unchanging velocity
  867. Relativity of rotating system(s)
  868. No (Lorentz) Invariant tensor of rank 3?
  869. vacuum energy destruction of wormhole
  870. Schwarzschild solution and velocity of stationary observer
  871. Geometrodynamics
  872. Gravitational Waves Papers
  873. Paradox on Special Relativity
  874. Question about relativity example
  875. Is there any Limit to the kinetic energy
  876. Speed of light at an angle
  877. Is time really a dimension?
  878. question on time dialation
  879. A possible "uncrossable" boarder between bradyons and hypothetical tachyons...
  880. Curved/Warped space
  881. How is Constant speed of light referenced
  882. Evidence that space and time has equal footing?
  883. Euclidean Geometry
  884. space expansion
  885. Close space after big bang
  886. Symmetry Argument
  887. Equivalence (?) inside a rocket
  888. relativistci poisson brackets
  889. Simple question from a newbie
  890. Photon's frame of refernce
  891. Is Relativistic Mass Plausible?
  892. i think i figured out gravity, really
  893. Numerical Relativity: Components of the Lapse Function?
  894. Parallel transport and geodesics
  895. A thought experiment to aid my undertsanding
  896. beginner's question on GM
  897. Less elapsed time: Lorentz Transformation or Spacetime Interval ?
  898. Einstein energy
  899. Curved spacetime: embedded or not?
  900. Can someone explain Gravitational Time dilation?
  901. View from a spaceship at relativistic speeds
  902. Is Angular Velocity, Momentum, and Energy Frame Invariant
  903. Spacetime manifold: initial condition or result of GR?
  904. Schwarzchild spacetime singularity
  905. Why do really fast speeds keep you from aging or "feeling time"?
  906. Curved spacetime and imaginary coordinate
  907. Minkowski norm
  908. Cancer developing in different RF's
  909. Retrieving Information from Black Holes (Please repond)
  910. Effective potential and geodesics in G.R.
  911. Proof set of one-forms is a vector space
  912. Geons the missing mass?
  913. Electromagnetic blackhole violates 2nd law of thermodynamics?
  914. Gaussian to MKS Four-vector Conversion
  915. Projection operator
  916. Geosynchronous Orbits
  917. Does coupling to stress-energy imply coupling to Ricci?
  918. Ask about the 1919 experiment
  919. light ray paths near schwarzschild blackhole
  920. Dilation & Contraction--First Post
  921. Wormholes -- too fleeting to be detected?
  922. Stress-energy tensor
  923. rotating disks and time dilation
  924. Help with energy-mass equivalence!
  925. Black Hole Time Machine (time dilation)
  926. Has Gravity Probe B proved framed dragging
  927. Relative simultaneity...
  928. Really moving. What does Bridgman mean.
  929. Can someone explain this time dilation problem to me?
  930. Some tensor theorems
  931. Blueshift question
  932. grtensor 5d???
  933. Space-time fabric
  934. Causality... who needs it?
  935. Relativity of Time Dilation
  936. Constancy of light speed implied in time and clocks !
  937. So gravity and accel can be transformed into eachother, but what about...
  938. Length Contractions
  939. Gravitational time dilation question
  940. the speed of gravitational field propagation
  941. Invariant Tensors in GR and SR
  942. Light in the box gravity - question.
  943. Time Dilation Paradox (variant distance between two accelerating bodies)
  944. In simplest terms, what is null dust?
  945. Conservation of Mass
  946. Misner-Thorne-Wheeler, p.92, Box 4.1, typo?
  947. Black holes and singularities
  948. A deviation from General Relativity on cosmic scales...
  949. photon gravity
  950. Simulating electron beam - what equations to use?
  951. Inverse square law
  952. basic question about relativity
  953. We can't determine who is moving?
  954. Lorentz Transformation
  955. Does Hubble's law implies accelerated expansion?
  956. Has anybody read this book on relativity?
  957. How the universe looks like at the speed of light
  958. Spinning "tornado" wheel - circumference and radius
  959. Kruskal and Penrose diagrams for a Minkosky spacetime
  960. Inside a black hole : looking for an animation
  961. Schwarzschild & Kerr black holes geometries
  962. About BH singularities
  963. grtensor
  964. Derivation of E=mc2
  965. Temperature during black hole collapse
  966. Derivation of momentum & energy formulas
  967. Relatvity of Vectors
  968. Three questions related to the principle of general covariance in GR
  969. Why is not scalar field?
  970. Chapter: The mechanisms behind Non-Simultaneity
  971. A few questions about the Lorentz factor
  972. Meaning of Lorentz Transformations purely mathematically ?
  973. Value of c and strange things that don't happen when at c
  974. How are watches syncronized
  975. Velocity addition
  976. Say gravity were larger, matter "burns" faster?
  977. Radius of Universe, electrons, and strings.
  978. Mmi
  979. linearized gravity
  980. empty space time
  981. Lightcones around Kerr ring
  982. Special relativity argument
  983. Gaussian Co-ordinates-background and derivation
  984. Special Relativity Questions
  985. Relativity and sound?
  986. Speed of light in gravity
  987. Light Cones / QM
  988. A Few General Questions About Special Reletivity
  989. Time Dilation and/or Kinetic energy the same/different?
  990. Reciprocal Lorentz Contraction Mismatch
  991. Is this an Ill-posed Question?
  992. Is black hole elementary particle?
  993. Speed of light vertical and horizontal in gravity
  994. Does space and time act differently at different scales?
  995. Doing General Relativity with Cartesian coordinates?
  996. Acceleration in an inertial worldline?
  997. Four-vector from 3 space components?
  998. Explanation of Wiki regarding Geodesics as Hamiltonian Flows:
  999. Wormhole Time Machine: As Time Goes On
  1000. Reason for positive energy
  1001. Is this idea of time travel consistent with relativity?
  1002. 45 dergree mirrors in Special Relativity
  1003. Slowly add mass to a neutron star till it collapses.
  1004. The “Grand Father” paradox is flawed.
  1005. [Special relativity - Mathematical background] Tensor and pseudo-tensor
  1006. Mass expansion
  1007. Expanding universe and light detection
  1008. Bivectors, Cartan Geometry and Curvature
  1009. Shrinking circles
  1010. Energy Density of the gravitational field
  1011. Anti-matter black-hole, matter black hole, different?
  1012. What is Cosmological Costant?
  1013. Relativistic Acceleration Contradiction
  1014. Trying to understand the "Why" or Relativity.
  1015. Has einsteins experient with time been proven, why hasn't it been applied or used
  1016. Principle of Least Action - Straight Worldline on a Geodesic
  1017. Ricci Tensor in Empty Space
  1018. Relativity and Uncertainty
  1019. Question about equivalence principle
  1020. Spacetime and Newton's bucket
  1021. The Greatest Time Traveler
  1022. Gravitational redshift and time dilation
  1023. Faster than the speed-of-light
  1024. confusion about a laser shining perpendicular to a moving inertial frame
  1025. why is invariant interval invariant?
  1026. General Question about Gravitational Potential & General Relativity
  1027. Does c-invariance in SR postulate need inertial frames ?
  1028. Time
  1029. Law of reflection in SR
  1030. how is mass density affected by speeds near c?
  1031. How is the -(ct)^2 term in Minkowski metric conceived?
  1032. Slow clocks on moving body is an illusion?
  1033. Continuous application of Lense-Thirring precession: flyby anomalies
  1034. Tensor Integration
  1035. Einsteins gravity theory (bending space) question
  1036. Diving into a Black Hole
  1037. Matrix Formalism of GR
  1038. theory of relativity second postulate
  1039. Lorentz contraction
  1040. Need help understanding the twins
  1041. local detectability of frame-dragging
  1042. Gravitational redshift and time dilation
  1043. Relative Energy Generator
  1044. GPS and time dilation
  1045. Exactly how is causality violated by superluminal travel?
  1046. Q. about Bradley's Stellar Aberration
  1047. Configuration comparison.
  1048. Relativity confusion
  1049. question tensors
  1050. Equivalence principle to other forces?
  1051. Power Required to Accelerate Space Craft to Near Light Speed
  1052. Relative motion and time dilation
  1053. Space contraction and stress.
  1054. electric resonance in a moving frame
  1055. old question
  1056. Special Relativity.
  1057. Merging Black Holes & the Nature of Time
  1058. Time Dilation equation questions
  1059. GR in Matrix format
  1060. How do black holes gain mass?
  1061. question
  1062. Moving observer can see what?
  1063. Energy conservation in relativity
  1064. Energy density of grav. field - analagous to EM
  1065. Charged particle in free fall
  1066. riding on a photon
  1067. Does spacetime could curved in a "square way"?
  1068. why Hawking radiation contains other particles besides photon?
  1069. Relative motion, frames
  1070. problem
  1071. How to study Gravitational Redshift of Sound Waves?
  1072. can string theory/gravitons/broken SUSY reproduce GR time dilation?
  1073. Black hole can regard as most efficency mass-energy convecter?
  1074. How to solve space-time variation in the ocean?
  1075. Video camera links in Special Relativity
  1076. Relativistic Collision
  1077. Formulation of Einstein-Hilbert Action
  1078. Very Old Question
  1079. properties of einstein tensor....
  1080. Trying to understand rotating black holes
  1081. Einstein's box in media and mass-energy equivalence
  1082. Einstein's box of phonons and energy-mass equivalence
  1083. Contradiction between Quantum Mechanics and Special Relativity？
  1084. Covariant divergence question from Landau and Lifshitz
  1085. What's the formula of Doppler effect in media?
  1086. S,S' in the Lorentz transform.
  1087. schwarzschild affine connection
  1088. twins
  1089. Lorentz Contraction
  1090. speed of light in the medium
  1091. Active diffeomorphism
  1092. All rotating black holes will eventually stop?
  1093. Issues with EF coords.
  1094. Is it possible? (faster than light in a medium)
  1095. Why FTL travel of light spot can't carry any information?
  1096. simple argument for area conservation under Lorentz transformation?
  1097. Time and the relative speed of an Expanding Universe
  1098. Modification of Law of Reflection from a (moving) mirror in Special Relativity
  1099. Time dilation can't possibly be explained this easily
  1100. Falling into a charged black hole
  1101. Is Faster than Light travel impossible?
  1102. massless particles ?
  1103. the aether
  1104. Relativity Questions on Motion Limits
  1105. Rotation and Minkowski diagrams.
  1106. The relativistic Lagrangian
  1107. rotating minkowski metric
  1108. I am having troubles with the gravitational time dialtion equation.
  1109. Rotation and Minkowski diagrams.
  1110. Doesn't relativity define time as an illusion?
  1111. Light sphere question
  1112. Curvature perturbation
  1113. Issues with advanced Eddington-Finkelstein coordinates
  1114. The "False Twin Paradox"
  1115. Can you scoop out part of a black hole?
  1116. Light speed spaceship time travel conundrum
  1117. experimental sticky (Hafele-Keating experiment)
  1118. embedding LaTex
  1119. Evotos Experiment
  1120. mass at equator versus mass at pole
  1121. physical meanings of universal coordinates in schwarzschild metric
  1122. Relativity through different scales
  1123. Gravitational vs geodesic proper time
  1124. Pendulum Clock
  1125. Increase in spin rate as object collases to black hole
  1126. Equivalency Principle
  1127. Help me understand Cosmological constant?
  1128. Relativistic Rotation
  1129. Mass
  1130. Gravities range
  1131. How little does a hydrogen atom curve space?
  1132. special relativity. I need help
  1133. Thought experiment about Simultaneity
  1134. Time paradox?
  1135. Sun Vanishes - How Long Till Orbits Change?
  1136. There is a mistake in relativity.
  1137. Einstein and idea that nothing can travel faster than the speed of light
  1138. Isn't working with the relativistic Lagrangian AWFUL?
  1139. Einstein's field equations
  1140. Writing the EFE in a different form
  1141. General Relativity look at backwards.
  1142. Dificulty with Einstein's derivation of TAO
  1143. Differences in Newtonian and Relativistic predictions of gravity
  1144. light, dielectric medium, c, wavelength
  1145. Absolute zero and hot in respect to time dilation
  1146. speed of light vs time
  1147. Crossing the Event Horizon of a Black Hole
  1148. Accelerations in Kerr Metric
  1149. How would you calculate how bodies curve space/time?
  1150. GR in a universe without matter or energy
  1151. Would like to learn more about the Penrose process
  1152. Where did Einstein say :mass curve space/time ?
  1153. Special Relativistic Gravity
  1154. Looking for an equation?
  1155. Would we as humans ever be able to travel close to the speed of light?
  1156. Lorentz contraction of a light pulse
  1157. 2 black holes, 2*M --> 1 b.h., 2*M - f*2*M?
  1158. Uniform background dust of plank mass black holes.
  1159. The Principles of Relativity - Help Kindly Requested
  1160. Tensor confusion
  1161. units time?
  1162. Relativistic gravity incomplete? Big Bang singularity
  1163. Time dilation and space travel
  1164. Wormhole time-travel question
  1165. Thoughts about Causality and Paradoxes
  1166. where s the moving train on the embankment?
  1167. Seriously, why can't I go faster than the speed of light?
  1168. Have you read "Why does E=MC2"?
  1169. Light and time
  1170. Hilbert's Derivation of Field Equations?
  1171. Quick question about gravity/time dilation...
  1172. Singularities in colliding black holes
  1173. how to pronounce 'Christoffel'
  1174. Embedding Diagrams
  1175. Why does a travelling twin age slower but not get shorter?
  1176. Einstein equation point mass solution
  1177. acceleration and time... question
  1178. Relativistic velocity limitations
  1179. Shoot Light
  1180. Gravitons
  1181. Gravitational force vs. relativity
  1182. Question about light speed (is velocity cumulative?)
  1183. Twin Paradox Query
  1184. Space as a linen sheet.
  1185. Extrema of proper time
  1186. Multibody system in general relativity
  1187. Revisiting Newton's bucket
  1188. Light and Relativity
  1189. "Using light to see the world requires speed of light to be maximum?"
  1190. is the Doppler effect for atomic spectra a purely realistic effect?
  1191. Questions About Absolute/Relative Velocity and Time
  1192. Relativistic scattering Lab and CM frames
  1193. Weak and strong equivalence- what is the difference really?
  1194. The Relativistic Boat
  1195. the photon gas in the curved space
  1196. Rotating Black Hole?
  1197. Dust filled universe but dust is a real field.
  1198. Real Lorentz–FitzGerald contraction
  1199. If the sun suddenly dissapeared.
  1200. Time Dilation
  1201. Special Relativity and Distance/Space
  1202. Understanding the Lemaitre metric
  1203. distance in GR
  1204. Pioneer anomaly not gravitational
  1205. A simple SR question, but confusing to me...
  1206. Steel bar bisected by event horizon
  1207. A bunch of LHC relativity questions
  1208. Einstein Vacuum Equation, Vacuum Constraint Equations
  1209. Is your velocity constant in space-time?
  1210. Acceleration, and Observers
  1211. Question about momentum
  1212. On the Ether "Swimmer Analogy"
  1213. How can we say there is Zero G force in space what about SUN's G ?
  1214. What is the minimum mass required to distort space and time ?
  1215. Is the range of EM forc affected by Black Hole Gravity
  1216. Time sped up in G-field
  1217. Half the twin paradox!
  1218. The doppler effect and time dilation context
  1219. Faster than Light
  1220. Dust filled universe, is there a type of tension defined?
  1221. Part of a bigger universe.
  1222. Lorentz Contraction: What really Contracts?
  1223. 1905 paper "Does the Inertia of a Body Depend Upon its Energy-Content?
  1224. The Physical Meaning of the Relatvity of Simultaneity
  1225. Physical meaning of index gymnastics
  1226. Time dilation - correct term?
  1227. gravitational waves and gravitation
  1228. What is accretion disk of BH?
  1229. Alcubierre Warp Drive
  1230. hawking and ellis help
  1231. Properties of Mass in Curved Space-Time
  1232. Why the c in mc^2?
  1233. Do particles without a rest mass bend spacetime?
  1234. Mobile communication with electromagnetic waves and theory of relativity
  1235. Telling if a reference frame is moving or at rest
  1236. Superluminous Objects and Black Holes
  1237. Can Black Holes Exist?
  1238. Why does Einstein say that a clock slows when it is moving?
  1239. speed of light vs speed of time
  1240. Alcubierre drive has trouble with quantum effects
  1241. Planck scale dimensions...
  1242. Question about Einstein's Original E=mc^2 derivation
  1243. Galileo and Lorentz transformation
  1244. Another paradox from the force transformation laws?
  1245. relativity and time (twin paradox)
  1246. Bigbang Bigcrunch "Singular" event?
  1247. Clocks running slower is an illusion
  1248. How to Determine Velocity in Special Relativity
  1249. History and Timewarp
  1250. Stress-energy tensor
  1251. How does curved space create gravity?
  1252. Extended thought experiment
  1253. Frame of references in time dilation
  1254. Changes in planet orbits as a star (eg. the Sun) decreases is mass.
  1255. Calculating Time dilation in Accelerated systems
  1256. So what exactly E=mc^2 says ??
  1257. Gravitational field of photons
  1258. The not paradox twins
  1259. bending of light and the travel distance
  1260. Light-cone coordinates
  1261. What is - Conical Singularity
  1262. how do we know nothing can go faster than c and why?
  1263. Black Holes are Singularities..... or vice versa?
  1264. The Physical Meaning of gravitational time dilation
  1265. Cool thought experiment.
  1266. Light Traveling in Opposite Directions
  1267. The Meaning of Living in 3 Dimensions?
  1268. Where is Light?
  1269. about four-momentum
  1270. Energy in different references
  1271. Can molecules exist in other dimensions?
  1272. What is time?
  1273. Time Dilation/Gravitational Theories Needed for Short Film
  1274. Space Time Curvature Question.
  1275. Stationary below the event horizon?
  1276. Gravity dilemma (explained)
  1277. Light cone = black hole?
  1278. Can spacetime be created ??? if yes how if not why ???
  1279. Elaborating on stress-energy tensor
  1280. Lorentz Transformations
  1281. The time machine idea !!!!
  1282. Relativity of Simultaneity - Question about the Classic Train Example
  1283. Why must we travel through something at C?
  1284. Lorentz Contraction Circular Motion
  1285. Cascading reference frames
  1286. Equation of motion in a scalar field
  1287. Electron repulsion
  1288. Gauge fixing in GR
  1289. Event horizon of elementary particles
  1290. Invariance of speed of light
  1291. Relativity of Simultaneity
  1292. Traveling at c-(1 planck length/planck time), then accelerate. What happens?
  1293. Mach's principle
  1294. positive gravity effect
  1295. Is/are there any invariant OBJECTS in relativistic? Is there a substratum?
  1296. Killing vectors in Robertson-Walker mertric
  1297. Can light be redshifted by gravitational fields?
  1298. minimum speed in relativity
  1299. Terminology; "distinguished"
  1300. Which photon hits?
  1301. Theory of Relativity
  1302. Derivation of Kerr Metric
  1303. Frame-Jumping & Incorrect Gamma Derivations Aplenty...
  1304. general relativity
  1305. Equilibrium in Multiple Inertial Frames
  1306. Thomas Rotation
  1307. Lorentz Transformation (simplified)
  1308. 4-velocity "length" under a force
  1309. Galaxies travelling faster than the speed of light??
  1310. Basis vectors under a Lorentz transformation
  1311. speed ?
  1312. special theory theory oe relativity
  1313. Gravity is an entropic force??
  1314. Einstein-scalar field action --> Einstein-scalar field equations
  1315. How to derive non relativistic Euler equations from the perfect fluid stress tensor
  1316. Is special relativity sufficient to treat the twin paradox?
  1317. Question regarding de Broglie wavelength.
  1318. Is GPS the only practical application of General Relativity?
  1319. Expanding Space vs Energy
  1320. Curving space at speed of light?
  1321. Speed of Light
  1322. difference between relatavistic kinetic energy and normal kinetic energy
  1323. time
  1324. Time travel
  1325. Killing Vector Equations
  1326. To radiate or not to radiate
  1327. Does time "stopping" at c explain spooky action at a distance?
  1328. Equivalence Principle
  1329. "No Hair" theorem?
  1330. Relation between total energy and rest mass
  1331. Self-torque of a compressed rod?
  1332. Killing vectors in space with torsion?
  1333. Variational principle for deriving dynamics of different fields in GR! - Bibliography
  1334. Relativity of spring "constant"
  1335. Question about tensor derivative
  1336. What is the physical explanation for boosts not commuting?
  1337. hand-wavy proof of (part of) Birkhoff's theorem
  1338. on bohr- sommerfeld theory
  1339. Why vacuum Einstein equations are hyperbolic equations?
  1340. liquid spacetime
  1341. Hartle Gravity - Simple basis vector question
  1342. Light Passing through a Moving Medium
  1343. Is the Universe Galilean?
  1344. Understanding the Photon.
  1345. how many numbers to describe a point in space in GR?
  1346. Death by Lorentz Contraction
  1347. Does a charged particle in free fall radiate?
  1348. How to Calculate Proper Time
  1349. Length contraction and interstellar travel
  1350. gravity and time
  1351. dark energy and mass-energy conservation
  1352. Time
  1353. What is intrinsic derivative?
  1354. nature of space-time
  1355. minkowski question
  1356. Problem solitions
  1357. what is the speed of gravity
  1358. Length Contraction Documentary
  1359. So(25)
  1360. proving x^2-c^2*t^2 invariance
  1361. Light, mass and gravity
  1362. Clock postulate and differential aging
  1363. Infinitely (Relatively) Smaller Black Holes
  1364. Violation of Newton 2?
  1365. Nature of the time dimension in 4D space-time
  1366. Understanding the 3 coordinate systems for a Schwarzschild geometry
  1367. Can a "near-by" black hole affect the shape of another black hole.
  1368. Superluminal travel.
  1369. The idea of the conformal method?
  1370. Redshift/Blueshift of Gravity Waves Around a Black Hole
  1371. i don't understand the light deflection calculus
  1372. relativity and collapsing stars
  1373. Frame dragging and absolute rotation
  1374. about four-acceleration
  1375. momentum in time
  1376. Commutativity of Tensor Field Multiplication
  1377. Does Hawking deserve a Nobel prize for his singularity theorem?
  1378. Reference Frame of a Photon
  1379. Gravitaional field can store mass?
  1380. A.G. Kelly and his criticism of relativity
  1381. Thought Experiment
  1382. "frame-jumping"
  1383. Thomas precession
  1384. An other train paradox.
  1385. Simultaneity Train Example
  1386. Hafele and Keating Experiment
  1387. Are space-time curvature 3D
  1388. Mach and the Twin Paradox
  1389. Einstein Tensor...
  1390. Velocity vs. Time
  1391. A way to calculate the practical range of gravity
  1392. Gravitational attraction related to temperature
  1393. Absolute Rest & Black Holes
  1394. Verlinde gravity
  1395. Twin Paradox - Acceleration vs Velocity
  1396. relativity theory in 2d
  1397. Relativity of potetial energy
  1398. Gravity from spacetime curvature
  1399. Putting numbers in Einstein's thought problem
  1400. Inertial Frames
  1401. Weight, Acceleration, Gravitational Equivalence
  1402. The potential problem
  1403. Inertial frames in SR and GR
  1404. Inertial Frame
  1405. time slows down for who?
  1406. Basic matrix representation question
  1407. Oh my God is the Catholic Church right?
  1408. Gravity, Inertia and Contraction
  1409. Why isn't the Cotton tensor identical zero?
  1410. 3-d model for space and black holes
  1411. Gravity as an emergent phenomenon
  1412. Distance of a lightyear?
  1413. It doesn't make sense
  1414. Maxell's Equations
  1415. The gravitational Klein-Gordon Equation
  1416. acceleration does not effect clocks?
  1417. question about traveling in the future
  1418. particles (not??) following geodesics in GR
  1419. The Bianchi identity as a new incarnation of the momentum-conservation law
  1420. status of TeVeS
  1421. special relativity
  1422. Gravity ~ Acceleration ~ Centrifuge & GR
  1423. Locally flat - what does it mean?
  1424. twin paradox - which twin is older?
  1425. will time stop if we were able to go as fast as the speed of light?
  1426. Simple wedge product issue
  1427. Position Matters?
  1428. Can Chromatic Aberration arise from Gravitational Lensing?
  1429. Energy-momentum equation
  1430. E Field and Field Transformations
  1431. time dilation & light speed
  1432. Is SR-allowable time travel "future-only"?
  1433. When you are no longer traveling at the speed of light, why don't you feel older?
  1434. Light speed measured from distance
  1435. Twin paradox in a closed universe
  1436. SR time dilation real or perceived
  1437. Progression of time when velocity is very high
  1438. Energy Mass equivilance
  1439. Force Law Transforms
  1440. Infinite gravity and curvature
  1441. SR derived solely from one postulate
  1442. Gravity, work, geodesics
  1443. metric light distance and gravitation
  1444. Gravitational force of one nucleon
  1445. Newton's universal law of gravitation...
  1446. "Cranks" vs Einstein
  1447. Tidal forces inside BH in horizontal direction
  1448. about invariant hyperbolae
  1449. help with geometric interpretation of 1-form
  1450. Does measuring the age of the universe result in objective observation?
  1451. Slowing of Time
  1452. Monkey Hunter demonstration in GR
  1453. Question concerning wave 4-vector
  1454. Travelling faster than the speed of light?
  1455. GR derived using spinning ride example?
  1456. The 4-D Laplace equation and wave equation
  1457. Mass to light ??
  1458. Time and Space
  1459. Can you increase the speed of light?
  1460. inconsistent forms of the metric in a uniform field
  1461. light vs. time
  1462. Counter intuitivity and relativity
  1463. Transformation of Force
  1464. geometry of minkowski spacetime...
  1465. Metric of a surface
  1466. Hyperbolic motions
  1467. Einstein metric and Space-time metric
  1468. Dispute over basic relativity question
  1469. How do we get E=mc2?
  1470. G at small distances
  1471. general relativity
  1472. Transformation of k_y in the wave 4-vector
  1473. tests for radiative character of spacetimes?
  1474. Squaring the energy
  1475. Time dilation = something is wrong...
  1476. Differential Forms Integration Exercise
  1477. Einsteins light beam....Lets go for a ride...again
  1478. Metric tensor
  1479. Dot product of 4-force and 4-velocity
  1480. A question about general relativity
  1481. Unsophisticated, theoritical implications of time dilation between 2 worlds
  1482. Energy conservation in a closed universe
  1483. The Vielbein postulate
  1484. Non-contracting closed space GR?
  1485. Shady Crypt Observatory E=mc^2 derivation
  1486. Isotropic inhomogeneous metric
  1487. A problem in GR
  1488. Time and Motion
  1489. Is curvature guaranteed if only one connection coefficient is 'large'
  1490. Time Dilation -light vs. spaceship
  1491. Real physical effects of Relative Motion
  1492. Particles faster than light
  1493. Relativity and Magnetism
  1494. LHC, Mass, Higgs, Relativity
  1495. basics
  1496. Determining 4-vector character of a 4-tuple
  1497. Schutz - A First Course in GR - Simple Summation Question
  1498. Why no faster than c?!!
  1499. k=-1 closed space
  1500. A spinning universe...
  1501. First reactions to Einstein's theories? (support or refute)
  1502. Thermal equilibrium in GR
  1503. spinning disk approaching c, what will happen?
  1504. Geo600 search for gravity waves
  1505. Null curves vs. straight curves on Minkowski space
  1506. One Way Twin Paradox
  1507. Energy and mass in relativity
  1508. Stretched & Compressed Clocks
  1509. definition of a rotating frame in GR?
  1510. Einstein Velocity addition
  1511. theoretical physics videos
  1512. preferred frame
  1513. rest mass
  1514. Relativistic Doppler effect and relativity principle
  1515. Twin paradox without length contraction
  1516. Conformal compactification
  1517. Does an electron moving along a geodesic radiate?
  1518. Strange geodesic in Schwartzschild metric
  1519. light speed, time dilation question
  1520. Does Time Exist at the Speed of Light???
  1521. What is a physical property?
  1522. Clarification Needed
  1523. Help with the basics of Maxwell and Lorentz equations
  1524. String theory vs. Relativity
  1525. Is the equivalence principle good for anything?
  1526. proper time
  1527. The Gravity of Photons
  1528. Some questions regarding gravity
  1529. Torque relative to an inertial frame
  1530. Experimental tests of General relativity vs Cartan extension
  1531. Special Relativity / Cosmology
  1532. Rest frames
  1533. Ontological concepts(?)/ Special relativity.
  1534. Equivalence of mass and energy
  1535. "Visualizing" Ricci curvature
  1536. diameter?
  1537. Time Travel Question (from "A Briefer History of Time")
  1538. What's up with spinning superconductors?
  1539. Finite energy super-luminal propagations
  1540. The relation with time and light
  1541. General Relativity, is gravity a force?
  1542. Light clock moving to demonstrate time dilation
  1543. estimating/counting photons in two frames
  1544. Syl & Der
  1545. Blackhole can be relative?
  1546. An elastic collision
  1547. acceleration of light?
  1548. Deriving t=T/√(1-v²/c²)
  1549. Gravitational lensing and red shift
  1550. Twin Paradox aging question
  1551. Relative velocity=relative momentum?
  1552. Looking for a stress analogue in E&M
  1553. future and past
  1554. question
  1555. Black Hole "particles" - acting as bosons?
  1556. Move one, How long does it take for another one to move?
  1557. Explanation of General and Special Relativity
  1558. velocitiy turns things into black holes?
  1559. Sagnac Effect and Special Relativity
  1560. Attaining speed of light
  1561. Mass Variation
  1562. Geodesics
  1563. General relativity and Higher dimensions
  1564. speed of an electromagnetic wave and gravity
  1565. Confirming what I have read.
  1566. Mass Energy Equivalence and Kinetic Energy
  1567. Time it will take when traveling at speed of light
  1568. Any link between Plebanski and McDowell-Mansouri formulations of GR?
  1569. Relativity, Gravity, "Attraction", Curved Space
  1570. Gravity on the Minkowski spacetime
  1571. Speed in general relativity
  1572. Newton, Einstein, multiply connected spacetime, Energy and so forth...
  1573. Object from the sun at half light speed
  1574. matter into energy at high velocity
  1575. Gravity and moving Electric Charges
  1576. Free falling reference body
  1577. Question about my reading
  1578. What happens biologically during time dilation?
  1579. I Still Don't Get General Relativity
  1580. Symmetry group in GR
  1581. conformal killing vector
  1582. Formula for Density
  1583. What are the effects of Spacetime "Drag"?
  1584. Red shift Blue shift
  1585. about hawking radiation
  1586. about tidal forces
  1587. Gravity and Instantaneous Information sharing
  1588. Yet another doppler question (regarding conservation, time, and irradiance)
  1589. Adding Relative Velocities
  1590. Is EM theory in curved spacetime the same as "unification"?
  1591. Relativity of simultaneity
  1592. What are the shortcomings of Misner, Thorne, Wheeler?
  1593. Einstein's Train
  1594. Calculating gravitational time dilation
  1595. Change in a singularity!
  1596. Action for the relativistic point particle
  1597. relativity
  1598. Derivation of Lorentz transformations
  1599. Which Equation is right?
  1600. How do we determine one clock is better?
  1601. Minkowski 4-space? Yes or No.
  1602. very close binary, strongest steady source of gravitational waves
  1603. Getting close to Speed of light...
  1604. Anisotropic World
  1605. e=mc2 question.
  1606. interior metric solution...
  1607. about the Rindler metric and the Weyl tensor
  1608. 5 Light-Year long stick question..
  1609. Concept on Gravity
  1610. 300 Years of Gravitation, Updates?
  1611. Spacetime...3+1?
  1612. E = mc^2
  1613. "If a photon had a mass, time travels would be possible"
  1614. weight
  1615. Energy-Momentum Tensor
  1616. relativity paradox in exponentially accelerating train
  1617. Shape of spacetime
  1618. What happens if we cut this rope off?
  1619. Is periodicity relativistic?
  1620. Lagrangian/Hamiltonian for classical point particles in SR
  1621. einstein's hypotenuse
  1622. Einstein Field Equation Solution - How?
  1623. List of Christoffel Symbols
  1624. Relationship btwn Killing Vectors and Geodesics
  1625. Does velocity affect Gravity.
  1626. Speed of light constant?
  1627. 1PN metric vs. Schwarzchild
  1628. Why does the speed of light have a maximum speed?
  1629. relativity
  1630. Confused about derivatives of the metric
  1631. Relativistic asteroid collision...
  1632. holaaaaaaaaa
  1633. variety of black hole shapes
  1634. Solving the Equation of Geodesic Deviation
  1635. Spacetime
  1636. Einstein holding Maxwell's equations above Newton's equations
  1637. Einstein again +, on large scale.
  1638. Time scales in Inertial Frames of Reference
  1639. One Forms
  1640. inconsistency in relativity paper
  1641. Schwarzshild black hole
  1642. Faster than light travel proved... sort off
  1643. Bullet vs Photon: speed of light, momentum and reference frames
  1644. Eddington-Finkelstein, Regge-Wheeler, Kruskal-Szerekes coordinates
  1645. Question about the kinematic equation
  1646. Does Mass disappear and become Energy?
  1647. Universal expansion
  1648. Question about Brian green book THE FABRIC OF THE COSMOS
  1649. Maxwell eqs invariant under other transforms
  1650. Applying variational principles to that metric describes a black hole!
  1651. Mass or Charge?
  1652. what is the difference? special&general..
  1653. according to GR, the future already exist?
  1654. Naive question
  1655. Newton's Thought Experiment
  1656. Einstein v Minkowski.
  1657. Close to C orbit around Earth and how time would be affected
  1658. Zwartschild radius of black hole link between matter and energy?
  1659. Connection vs metric
  1660. length contraction, hubble constant, and C
  1661. Why is spacetime curved in GR?
  1662. Hulse-Taylor versus Jupitor-Triton
  1663. Why is the Equivalence Principle True?
  1664. GR effects
  1665. Metrics on a manifold, gravity waves, gauge freedom
  1666. Relative speed of light paradox
  1667. Photon's Mass and Speed of Light [Confused]
  1668. What happens after you travel at a relativistic speed
  1669. Why does mass cause gravity
  1670. Decomposition of the wave-vector in terms of wavelength
  1671. Physical interpretation of breaking causality
  1672. Minkowski's mechanics
  1673. About length contraction
  1674. The Universal Time Coordinate
  1675. numerical GR
  1676. A book on GR
  1677. Christoffel symbols
  1678. Light speed in a non Inertial frame of reference
  1679. question
  1680. question1
  1681. Energy of the gravitational field in GR
  1682. Null geodesic in 2 dimensional manifold
  1683. Timelike geodesic
  1684. Relativistic length expansion in general accelerated system
  1685. C according to what reference frame?
  1686. Molluscs?
  1687. Help....!
  1688. Energy-Momentum Equation of a Particle
  1689. Is the cosmological constant constant?
  1690. What is the connection between General Relativity and gravitons?
  1691. twin paradox thought experiment
  1692. The shape of gravity
  1693. about the mass-energy relation
  1694. Speed of light for different observers
  1695. Photon-observer meaningless?
  1696. Now i'm getting all confused...
  1697. GR equations
  1698. Relativistic lenses
  1699. Electromagnetism, Relativity, Force, Space...?
  1700. Can you rip the space time fabric!?
  1701. Show that the light velocity c is constant under Lorentz transformations.
  1702. Riemann tensor in normal coordinates
  1703. Accelration & special relativity.
  1704. Neutral particle falling into a black hole
  1705. Are photons affected differently by gravity?
  1706. I need your Advice
  1707. Yet another relativistic acceleration question
  1708. Deflection of light (wave aspect)
  1709. Schutz vs. Hartle?
  1710. speed of light or speed of time?
  1711. finding the rest energy
  1712. Hulse-Taylor versus Pluto-Charon
  1713. Hubble's law
  1714. Relativity of simultaneity implies a universe for each reference frame?
  1715. Understanding solutions of GR
  1716. About Tensor Calculus
  1717. Emergent Gravity
  1718. Special Theory of Relativity paper
  1719. Energy density and gravity
  1720. what are tetrads and the spin connection
  1721. lagrangian densitys- variational formulation
  1722. Circular Motion in SR/weak gravitational field limit
  1723. Time dilation due to velocity
  1724. Max Tegmark sings the relativity song.
  1725. Stuffing a black hole full of electrons?
  1726. Spacetime Interval
  1727. Is symetry across inertial frames purely theoretical?
  1728. macroscopic particles?
  1729. Christoffel connection in Kaluza Klein Theory
  1730. An unusual view from Bridgman.
  1731. basic tensor help
  1732. Where does all this spacetime curvature come from?
  1733. geodesic completeness proofs
  1734. General Relativity - gravity self coupling
  1735. The velocity of electron near speed of light?
  1736. Arbitrariness in Special Relativity
  1737. Trouble with Lorentz transformations
  1738. How does the Stress Energy tensor relate to Noether's theorem?
  1739. Length Contraction and the Conservation of Energy
  1740. Mass dilation
  1741. About geodesically incomplete metrics
  1742. Tensor operations, Maxwell's field equations
  1743. Geodesic deviation
  1744. Newton-Cartan
  1745. Is black hole collapse stopped by zero point motion?
  1746. Four-Velocity & Momentum
  1747. Four vectors in complex notation
  1748. Printing mistake in A First Course in General Relativity?
  1749. A clever cosmologist refutes relativity
  1750. A basic question in general relativity
  1751. Raising and lowering indices of partial derivative
  1752. Divergence of product of killing vector and energy momentum tensor vanishes. Why?
  1753. Normalization of 4-velocity in general relativity
  1754. E=mc^2 can C^2 be described as a physical process?
  1755. bending of light
  1756. Trying to understand Special Relativity
  1757. How can time dialation cause gravity?
  1758. Einstein Notation
  1759. Indices
  1760. Divergence theorem in curved space
  1761. OEMB Section 3, confused
  1762. Ever-present vacuum
  1763. How can Space and Time exist?
  1764. Some Thought Experiments (simple ones)
  1765. Covariant derivative, timelike vector field (Kerr- Schild Class)
  1766. Question About The Expansion of The Universe And Time
  1767. Kronicker Delta, Levi-Civita, Christoffel ... and "tensors"
  1768. Spacetime Diagrams
  1769. Why is the measure and "finititude" of c critical?
  1770. Time dilation & symmetrical twin paradox variant
  1771. "E2 - p2c2 = m2c4" - Meaning of symbols
  1772. Gravitational Potential Energy
  1773. relativity question
  1774. Swartzchild Anisotropy
  1775. simultaneity & seeing the same event multiple times.
  1776. Andromeda Galaxy
  1777. relativistic energy of a ball
  1778. The static Killing vectors in Kruskal coordinates
  1779. Superluminal Frame Adjustments?
  1780. Curved space puzzle
  1781. Questions about gravity at relativistic velocities
  1782. I've gone faster than the speed of light, havent you?
  1783. A photon watching us
  1784. another relativistic dynamics question
  1785. What is spacetime made of?
  1786. Singularities
  1787. Could the speed of light be one of the slowest things in the universe?
  1788. Very simple thought experiment re: time dilation
  1789. Experimental "measurement" of Einstein's Field Equations
  1790. Is it possible to see at high speeds?
  1791. D'Inverno - another query
  1792. Divergence of curvature scalars * metric
  1793. Special Relativity Clocks
  1794. Why do massless objects travel at c?
  1795. Thermodynamics of Bosons, esp. Photons?
  1796. Time Dilation on a Merry Go Round
  1797. mass flow and its effect
  1798. Poynting's Theorem in Forms
  1799. Special Theory of Relativity Incorrect?
  1800. Alignment of axis
  1801. Invarients from the Faraday tensor
  1802. Rod shortening - physical reality?
  1803. Riemann tensor and flat spacetime
  1804. What accounts for invariant mass' confinement to less than c motion?
  1805. Photon in time versus photon not so much-ish in time
  1806. Energy variance, and pair production
  1807. confused about time dilain length contraction
  1808. Length contraction (objects & space or objects only)
  1809. Does energy alone contribute to spacetime curvature?
  1810. curvature space time
  1811. On the frame dragging effect
  1812. Help with differential geometry: Hilbert's stress energy tensor
  1813. Appearance of a wormhole?
  1814. Is acceleration relative? (In the same way that velocity is)
  1815. Newtonian limit of Gravitational Klein-Gordon Equation
  1816. speed of light for accelerated frames
  1817. General Relativity Revisited (What if gravity actully is a force?)
  1818. Cartan Formalism
  1819. Deriving the Schwarzschild metric just by using the equivalence principle
  1820. The Eternal Question of Inertia
  1821. Relativistic centripetal force
  1822. Confused by variational principle
  1823. Relativistic energy equations
  1824. Metric outside a spherically symmetric source.
  1825. Force Form of Dark Energy
  1826. Energy-->Mass-->Gravity
  1827. FRW universe with S^3 slices
  1828. what is "relativistic mass" and "rest mass"..
  1829. Observed speed of light [actually about relativistic velocity addition]
  1830. Speed of light in a "vaccuum"
  1831. Would light reach the earth in this scenario?
  1832. Clarifying the relativity theory
  1833. EM Force and GR
  1834. Time coordinate = timelike?
  1835. Mercury's precession
  1836. Understanding Spacetime
  1837. Time Travel Question...
  1838. 'Real' spacetime in GR?
  1839. twin paradox and length contraction
  1840. Vectors in Special Relativity
  1841. GR, gravity and curves
  1842. Energy into matter conversion possible?
  1843. Gravitational time dilation vs velocity time dilation
  1844. I'm new to Relativity. I have a quick question.
  1845. Ernst equation
  1846. Partial derivatives as basis vectors?
  1847. Slowing time
  1848. If I were light...
  1849. cosmological redshift
  1850. Sets of Trajectories Equivalence Requirements
  1851. Spinning Super Fluids
  1852. diffeomorphism invariance of metric determinant
  1853. Relativity of Simultaneity
  1854. Accelerating frames and black holes
  1855. EP test?
  1856. Gravitational redshift equation
  1857. Gravity and Charge
  1858. photons for dummies...
  1859. warped space...
  1860. lorentz boost help
  1861. General Relativity & Newton's Gravity - the fit?
  1862. Gravity and Energy
  1863. Other universes vs Hawking radiation
  1864. E=pc
  1865. Timelike, spacelike, or null?
  1866. Wave equation and Galilean Transformation
  1867. Why hyperbolic geometry in spacetime if it is flat?
  1868. Diagonal Ricci tensors
  1869. Twin paradox
  1870. cosmological expansion question
  1871. length contraction and time dilation equivelant?
  1872. Infinite speed of time
  1873. Train thought experiment (SR)
  1874. Riemann-Christoffel tensor
  1875. Lorentz transformation
  1876. Mass creates Volumetric Space
  1877. Question about proper time
  1878. Length contraction or Lorentz Contraction
  1879. What is this equation?
  1880. What exactly is Einstein's famous E = MC^2
  1881. Extrinsic properties of the curved space
  1882. Is the distance relative also?
  1883. Gravity and acceleration near to the speed of light
  1884. Lorentz transformation as a higher dimensional rotation
  1885. scenario allowing a signal to travel at superluminous speeds?
  1886. What kind of 'rotation' is the Gaililean transformation?
  1887. membrane theory
  1888. Spacetime proven or is the Graviton still alive?
  1889. Spaceship flying towards earth at relativistic speeds?
  1890. Why cant you go faster than the speed of light?
  1891. Lorentz boost and equivalence with 3d hyperbolic rotations
  1892. Does time obey the inverse square law?
  1893. Relative Velocity
  1894. If you were out in space, motionless
  1895. Ticking watch
  1896. scalar curvature
  1897. Relativistic Interception
  1898. Why is speed of light constant?
  1899. easy ways to explain special & general relativity
  1900. Distnace between points and isometric mapping
  1901. Doubt about proof that E=mc²
  1902. why aren't you accelerating when you fall
  1903. Green's function for Klein-Gordno equation in curved spacetime
  1904. Sears, Brehme and momentum
  1905. Special relativity question.
  1906. Do all observers agree on gravitational mass?
  1907. Correction term to Newtons gravitation law
  1908. gravity speed vs light speed experiment
  1909. Block Universe and Relativity
  1910. how long does a ray of light travel for based on ITS time scale
  1911. Relativity vs Quantum Mechanics
  1912. Do gravitational waves have different frequencies?
  1913. What if Einstein was wrong?
  1914. The metric
  1915. Vacuum solutions, and Explicit source terms
  1916. Unsymmetrical metric
  1917. Two dimensional manifold are conformally flat
  1918. Some thoughts on energy and momentum
  1919. Gravitational force and acceleration in General Relativity.
  1920. Straight line through spacetime.
  1921. I don't understand why your clock slows down
  1922. Acceleration inside an event horizon
  1923. Frame of reference of any observer
  1924. SR and differential geometry
  1925. Does the Null speed exist ?
  1926. Variational methods on Lagrangians (D'Inverno Chapter 11)
  1927. timelike and null coordinate
  1928. Are Lorentz and Poincare insufficiently credited for special relativity?
  1929. Need help explaining light speed limit to younger brother
  1930. Restoreing Force?
  1931. Stress-energy tensor diagonalization
  1932. Poincare Gauge Theory
  1933. Energy in Schwarzschild geometry
  1934. instantaneous rest frame
  1935. Gravity does not exist!
  1936. Mass energy equivalence
  1937. Motion and the Warping of Space
  1938. Mass increase at relativistic speeds
  1939. Do not believe this letter on gravitational radiation
  1940. Albert Einstein's Theory of Relativity
  1941. Is time scalar?
  1942. Mach's Principle and the Accelerating Universe
  1943. Generality of theta=pi/2 in Schwarzchild
  1944. Does the Universe spin (does it have an angular momentum)?
  1945. Why is charge/current density 4 vector a twisted differential 3-form?
  1946. Relativistic light aberration and backwards moving horizon
  1947. Faster than speed of light spaceship.
  1948. conservation of momentum
  1949. Curvature (Ricci things)
  1950. Different acceleration in an accelerating rocket?
  1951. Pound–Rebka experiment
  1952. Magnetic fields and clocks ?
  1953. Time dilation in biological processes
  1954. 'Direction' of space-time curvature ?
  1955. Struggling with the relationship between the Lagrangian L and the interval ds?
  1956. torsion and the conservation of angular momentum
  1957. Challenge to the 1st postulate
  1958. Effect of motion on energy
  1959. Compact support of matter fields
  1960. Trying to understand linear frame dragging
  1961. Relativistic Momentum: Please help me to see that it is conserved.
  1962. Derivation of Relativistic Momentum
  1963. Can you be in stable orbit inside a blcak hole?
  1964. Simple question about warping space
  1965. Raychaudhuri equation in Jacobson's paper (gr-qc/9504004) ?
  1966. Gravitational Length Contraction and Dilation?
  1967. travelling at speed of light and looking in the mirror
  1968. Layman in search of help understanding relativity
  1969. A ambiguous variation of Einstein--Hilbert action
  1970. Gravity
  1971. Einstein's Equations
  1972. Help with relativity
  1973. Heat and relativity
  1974. Time dilation by homogeneous distribution of massive objects?
  1975. Doppler sun tan
  1976. Domain of Dependence
  1977. how come massless photon has energy
  1978. Mach's Principle: Right or Wrong?
  1979. Very quick simple question
  1980. Conformal spacetime
  1981. Does compressing a mass to a smaller sphere change the curvature of space?
  1982. Acceleration Transformation
  1983. Worm-hole Question
  1984. In flux of negative energy and black holes
  1985. Equivalence Principle
  1986. Time dilation where there is no net gravity?
  1987. Riemann tensor: indipendent components
  1988. Lagrangian equation in special relativity
  1989. "Absolute" light speed or velocity or both?
  1990. lorentz violations
  1991. Euler-Lagrange eqns confusion
  1992. Should a stationary charge on the earth radiate?
  1993. A non-inertial frame is non-inertial with respect to what?
  1994. Derivation of Proper Time and Proper Space
  1995. light speed thought experiment please help
  1996. Twin Paradox (by acceleration)
  1997. question about dimension [G]=-2
  1998. Time dialation
  1999. Noether currents associated with diffeomorphism invariance
  2000. Faster than light / compress space
  2001. mass and relativity
  2002. Gravitational time dilation, redshift and doppler
  2003. What does E=mc^2 mean? How can it be used in an example?
  2004. What is spacetime?
  2005. "Topography" of spacetime over time.
  2006. Why can't we see the light before we turn on the bulb?
  2007. 4-momentum question
  2008. Does gravity vary with velocity?
  2009. Weyl tensor
  2010. how to diagonalize a warped metric
  2011. Laps and shift function
  2012. question about derivation of surface gravity of a black hole
  2013. Spacelike and Timelike singuralites
  2014. Only Galilei and Poincaré
  2015. Information Transfer and the speed of light
  2016. Boosting the frame basis
  2017. question re: time dilation equations
  2018. Einstein relativity- radiowaves when travelling at v>0.1c
  2019. basic questions about general relativity concepts
  2020. why do black holes die out?
  2021. Special relativity: local frames versus global frame in a loop scenario
  2022. Confusion About Rest Energy
  2023. What happens to a laser pulse that is beamed through a gravity well?
  2024. Travel time for a space ship at relativistic speeds
  2025. Length contraction and the direction of motion
  2026. Absolute speed of light
  2027. Speed of Light
  2028. special relativity
  2029. 'Creation' of Mass?
  2030. Relative motion
  2031. Invariance of spacetime interval
  2032. Opposite beams of photons or electrons
  2033. Photons have no mass?
  2034. I'm wondering about gravitational wave detection & why inteferometers work?
  2035. describing 4-vectors in space-time
  2036. What is Gravity?
  2037. Help with understanding Minkowski diagrams
  2038. density in the friedmann equation
  2039. possible to adjust light with magnetic field?
  2040. self-rotating body with speed of light
  2041. Derivation of classical limit in c = 1 units (i.e. without cheating)
  2042. Can one determine that an instrument is an accelerometer locally?
  2043. When will they meet?
  2044. Will it radiate?
  2045. Resultant time dilation from both gravity and motion
  2046. Atomic clock and Latitude
  2047. EM vector potential - covariant or contravariant?
  2048. Noob question: If you travel as fast as light, time freezes so...
  2049. Is the tensor product T^ab T_ab non-negative?
  2050. A question that probably has something to do with simultaneity
  2051. Blueshift and Blackholes
  2052. Lorentz contraction question
  2053. Do gravity waves experience doppler effect?
  2054. Diagrammatic Tensor Notation from the Beginning
  2055. spaceship trapped inside event horizon - serious flaw
  2056. Is black hole existence relative to the reference system?
  2057. We can not get back to our original position?
  2058. E=mc2 and Postulates to prove it
  2059. Centrifugal Forces and Black Holes
  2060. Relativity/Simultaneity - I need help understanding a few things?
  2061. The terms "length contraction" and "time dilation"
  2062. Not Real but Relative
  2063. Suppose We Were Blind...
  2064. Heuristic approach to the Schwarzschild geometry - Accident of deeper meaning?
  2065. Traveling anywhere in the galaxy in your life time
  2066. Covariant formulation of Coulomb's Law
  2067. Alice, Bob and Charge falling into Black Hole
  2068. Local curvature of surface just outside Schwarzschild radius
  2069. Who needs photons?
  2070. Is Mass Relative to the Observer?
  2071. Experimental verification of GR: Light bending
  2072. The parable of the two travelers
  2073. What's our time?
  2074. action
  2075. Space traveler and time dilation
  2076. Is the gravitational time dilatation a real effect?
  2077. Proof of the non-existence of ether
  2078. Why is energy-momentum tensor Lorentz invariant?
  2079. Simultaneity of events
  2080. Curved Space-Time and the Speed of Light
  2081. C Squared=E/M?
  2082. Drop a charge in a neutral black hole
  2083. Please explain General Relativity to me!
  2084. Orbital velocities in the Schwartzschild geometry
  2085. Back fall into the black hole
  2086. Angular momentum and the twin paradox
  2087. Entropy and Black Holes
  2088. Ricci scalar
  2089. Assignment of Variables plz Help!
  2090. Speed Constancy of Light Implication
  2091. Can one make inferences about what is inside a Black Hole?
  2092. Space=time
  2093. Question about relationship between quantum/relativistic physics
  2094. Rotations in general relativity?
  2095. What is the beggining of space time?
  2096. Is there a universal frame of reference for which to measure speed with? Consider...
  2097. Moving through spacetime
  2098. Will LHC measure gravitational waves?
  2099. Question on wording for paper
  2100. Length Contraction (Dilation?)
  2101. Stable orbits in Kerr metric
  2102. What ‘Something is conserved’ means in curved spacetime?
  2103. Kerr metric derivation (Adler, Bazin & Schiffer)
  2104. quantitative answers from GR
  2105. Confusion with curved space analogies
  2106. "generic" naked singularity
  2107. Is this a paradox in Special Relativity?
  2108. Photon, Lagrange Point, Binary Black Hole
  2109. metric, connection, curvature... oh my!
  2110. The 14 postulates of Special Relativity
  2111. Why we need Lie algebras?
  2112. Change volume V(t)
  2113. Absolute space? (stupid question)
  2114. Derivation of Thomas Precession formula
  2115. Constancy of the speed of light (locally)
  2116. The significance of special relativity
  2117. A historical question about the initial acceptance of Einstein's General Relativity
  2118. Falling into a Black Hole
  2119. Time To Near Light Speed
  2120. Curled Up Time
  2121. Timelike vs. null vs. spacelike four-current
  2122. what is Minkowski metric？
  2123. Mercury's precession
  2124. Schwarzschild and Newton potential
  2125. Stability of relativistic double star system
  2126. Gravitational anomalies
  2127. Einsteins Postulates
  2128. Questions on Energy, Mass, and velocity
  2129. Black holes and Time
  2130. Circular space contraction
  2131. Black holes and extended horizons
  2132. Standing still in spacetime
  2133. Schwarzschild metric as induced metric
  2134. Equivalence Principle question
  2135. Cumulative expansion based on H0 since T = 0
  2136. Trying to understand GR and density
  2137. how important was einstein, really?
  2138. Make sure the Lagrangian symmetry？
  2139. Duality of time
  2140. Clock in isotropic gravitational field
  2141. Gravitational time dilation on a non-spherical object
  2142. Einstein-Cartan relativity
  2143. Gauging Poincare to obtain Einstein gravity
  2144. curvature ~ dT/ds or dn/ds??
  2145. Gravity and its effect on time
  2146. Frame Independance of acceleration ?
  2147. Minkowski spacetime geodesics
  2148. Why is the speed of light independent of a frame of reference?
  2149. Generalizations of certain vectors
  2150. speed of light in refractive material
  2151. time in refractive materials
  2152. geodetic precession and parallel transport
  2153. What is the most accurate gravitational force equation?
  2154. Creation of a FAQ?
  2155. Does relativistic mass induce gravity?
  2156. How could you visit yourself 10 mins ago?
  2157. How does SR cause the speed of light to be constant?
  2158. Time Dilation
  2159. Density of a Black Hole
  2160. Is gravity an inertial force?
  2161. Gravitation force on Earth
  2162. GR geometry in a Binary system
  2163. Phase, Geodesics, and Space-Time Curvature
  2164. Spacetime / Time Dilation Question
  2165. Derivation of an old-time formula
  2166. Do black holes really exist?
  2167. Tensors create form metric
  2168. Not completely getting Lorentz transformations
  2169. Light SPhere Paradox
  2170. Rindler question
  2171. If mass becomes inifinite when approaching the speed of light, then ...photons?
  2172. Cartan formalism
  2173. Relativistic hydrostatic
  2174. twin paradox
  2175. Topology on manifold and metric
  2176. Galilean transformation from velocity composition?
  2177. Rotating sphere
  2178. Redshift and Zeeman effect .
  2179. integrating an accelerating Worldline
  2180. ""any mass accelarating @ 'c' is light ""
  2181. Maxwell tensor's antisymmetry
  2182. Does the 4th dimension mean our universe is definite?
  2183. Question about energy density in On the Electrodynamics of Moving Bodies
  2184. folding spacetime?
  2185. What is gravity?
  2186. Relativity problem thats been bugging me
  2187. Light interaction/interference
  2188. Schwarzschild Radius, Constantcy of Light speed, and Time Dialation
  2189. Anyone thought about this before?
  2190. speed vs. light
  2191. Twin paradox in a torus
  2192. Attempting to obtain the velocity subtraction formula (help required)
  2193. Inverse Compton Effect
  2194. Closure Speeds
  2195. Sadi Carnot
  2196. Relativity of simultaneity: the source of the headache
  2197. Frames vs Lines of Simultaneity
  2198. Inertial frame in GR
  2199. infinite mass
  2200. Upside Down Pendulum
  2201. Theory of Simultaneity & Wikipedia article
  2202. collision practice problems/tutorial
  2203. The Painleve–Gullstrand chart
  2204. matter to energy
  2205. "Open" and "closed" in the geometrical sense vs the thermodynamic sense
  2206. Simultaneity
  2207. One dimensional collision of 2 unequal masses
  2208. this is just wierd
  2209. Speed and Spacetime Distortion
  2210. Are photons massless?
  2211. Symmetry group of wedge
  2212. Layman's doubts about Gen Relativity
  2213. GRAVITATION by MTW: p.49, lambda or tau?
  2214. Relative charge and temperature
  2215. Velocity and mass?
  2216. time dilation and length contraction for rotating black holes
  2217. Relativistic Effects on the E-field
  2218. Minkowski Space-time (need help)
  2219. Definition of a symmetric connection
  2220. Velocity in space
  2221. Cosmological Redshift in FRW Coordinates – Energy Conservation & Time Dilation
  2222. Order of Operations, Lorentz Transformations & Superposition
  2223. Negative Gravity (not dark matter)
  2224. Newton Vs Einstein
  2225. conservation of the volume form
  2226. Time Dilation Problem
  2227. Ball dropping and frame of reference
  2228. One-Forms
  2229. Does a photon have energy density??
  2230. Spatial distance in GR
  2231. Acceleration/Deceleration in SR
  2232. Causality violation from FTL signaling within the same reference frame only?
  2233. Does electromagnetic radiation from pulsar stars
  2234. Minimal mass from cosmological constant?
  2235. mind problem
  2236. velocity subtraction problem
  2237. Variational methods on Lagrangians (D'Inverno Chapter 11) - continued
  2238. If photons don't have mass, why do their paths "bend" in a gravitational field?
  2239. Cauchy surface
  2240. Can an observer know he's in a black hole?
  2241. Summation Notation
  2242. Speed of the light!
  2243. Interesting General Relativity Scenario
  2244. Just what is time dilation?
  2245. Hyperphysics: Hafel-Keating experiment
  2246. what is timelike?
  2247. The Minkowski equation
  2248. Speed of object emerging from wormhole
  2249. Time paradox (?)
  2250. simple realtivity: Length contraction
  2251. The General Relativity Elevator Thing
  2252. Doppler Effect/Time Dilation
  2253. GR. Mach and cosmic redshift
  2254. What does it take to understand GR?
  2255. Ideas about black holes, light, and time.
  2256. electromagnetic stress energy tensor
  2257. Quantifying relativity of simultaneity
  2258. Is there such thing as relativistic angular velocity?
  2259. Another SR train paradox
  2260. Time dilation and quasars
  2261. basic time dilation
  2262. Definiton of Vector
  2263. Does light must be wave-like in Einstein mirror clock thought experiment?
  2264. GRAVITAION, by MTW, Exer. 2.6
  2265. Invariance of Lorentz Force
  2266. Calculating the binding energy of a black hole
  2267. The Collision Clock Experiment
  2268. The Switch Paradox
  2269. Fermats P & Gravitational Lensing
  2270. GRAVITATION, by MTW, Exercise 2.7
  2271. List of people who understand relativity
  2272. Thin shell velocity is greater than speed of light?
  2273. Is physics plain classical and Relativity an illusion?
  2274. The Speed of gravity
  2275. Gravity and Acceleration
  2276. Spacetime
  2277. Laser beaming
  2278. Thin shell under the horizon
  2279. Weird thought.
  2280. Is there a proof of parallel universes?
  2281. Stone's derivation of Thomas rotation
  2282. Making sure events are simultaneous in S'
  2283. The conundrum of stress energy tensor in GR versus QFT
  2284. Quick length contraction question please
  2285. Confused about relativity???
  2286. Help with Lorentz Transformation
  2287. One-Forms
  2288. Speed of a light spot
  2289. Relative velocity and work done
  2290. Time Dilation what is it?
  2291. Schwarzschild solution without matter
  2292. Repositioning clocks: continuing from the switch paradox
  2293. Existence of solutions to Einstein's equation
  2294. Is this a way to move faster than c?
  2295. A bit of a confusion regarding light, speed of it
  2296. Brown's derivation of Thomas rotation
  2297. Spacetime symetry
  2298. Intersection black holes
  2299. Time dilation an illusion
  2300. Magic Cord?
  2301. Photons in a Box Contribute Weight
  2302. Time dilation inside the second horizon of the BH
  2303. Is event sequencing relative?
  2304. paper on white holes
  2305. GRAVITAION, by MTW, Box 3.3
  2306. How long does it take to go 10LY?
  2307. what was the motive of michelson morley experiment
  2308. Spacetime Fabric
  2309. Minkowski Equation - II
  2310. Approaching Mirrors
  2311. mass increase from high velocity Q
  2312. Mmx-3
  2313. Alternative Lagrange's Equations
  2314. Nothing can travel faster than light
  2315. Object in Vacuum
  2316. Detecting absolute motion
  2317. 100m sprint at light speed.
  2318. Conformal group -> Poincaré group
  2319. Does general relativity allow for faster than light travel?
  2320. Minkowski-minkowski thin shell paradoxon?
  2321. confused about e=mc2
  2322. equation verification
  2323. streched spacetime
  2324. Electric switch paradox
  2325. Need help understanding something. About light speed - Thanks!
  2326. causality in GR (was "Is event sequencing relative?")
  2327. Special Relativity/Lorentz Transformation Derived in two minutes
  2328. TIme Dilation & Quantum Entanglement Question..
  2329. Are accelerating lines of simultaneity correct??
  2330. thermal effect on rest mass
  2331. Reframing and further acceleration
  2332. Relativity of velocity
  2333. speed paradox
  2334. Dynamics of thin shells in GR
  2335. Taylor & Wheeler on Thomas rotation
  2336. Minkowski Space Basics
  2337. CTCs violate no-cloning
  2338. How do you derive E2= (pc)2 + (mc2)2
  2339. how we transform enery into mass?
  2340. Time dilation or time relativity?
  2341. Do photons age? Do they remain stationary in x4?
  2342. Experimentally probing the photon's reference frame
  2343. phase vs group vs signal velocities
  2344. non-reciprocal Time Dilation
  2345. When is the arrival detected
  2346. Extrinsic curvature
  2347. speed of light not constant
  2348. Transport
  2349. C being constant in all frames deduced backwards..
  2350. Is it possible that black holes do not exist?
  2351. F = ma doesn't work when aproaching c
  2352. General relativity does not seem to address gravity
  2353. From special to general relativity: why?
  2354. Can wormholes form from shell collapse?
  2355. An example of moving towards a light source
  2356. breking speed of light
  2357. deducing some GR from SR?
  2358. Tangent space vs. Vector space
  2359. some technical questions about Birkhoff's theorem
  2360. General relativity flaws
  2361. Is Gravity a force, or not a force?
  2362. E=mc2 & Minkowsky spacetime
  2363. A question about reference system and time dilation
  2364. flat time slices in Gullstrand–Painlevé coordinates?
  2365. relativity train and clock synchronization
  2366. Lorentz factor equal to infinity + lots of questions
  2367. light implying consistency between QM and SR
  2368. Mirror questions
  2369. Energy conservation and universe expansion
  2370. speed of light ideas
  2371. Lorentz Transformations Question
  2372. Gravitation #3.14
  2373. Relativistic particle in Coulomb potential - any analytic solution?
  2374. Problem with fluid mechanics part of GR derivation
  2375. Speed of light in NON-inertial frames
  2376. Why "light clock" is flawed.
  2377. 1.5 Times the Speed of Light
  2378. A little confused about how Relativity works?
  2379. Special Relativity and the Particle-Antiparticle Problem
  2380. Possibility of time travel
  2381. Help With Raising and Lowering Indices
  2382. Given Riemann & connection, does time variation nec'ly imply full spacetime metric?
  2383. Software for relativity?
  2384. Another relativity check please.
  2385. I need to calculate δR: R is Ricci scalar
  2386. On the Speed of Light Again!
  2387. Penrose diagrams in general
  2388. is a function contravariant?
  2389. Doubts about Einstein Field Equations
  2390. question on lorentz transformation equations
  2391. is there any reason for tensor indices being ordered one way or the other?
  2392. Why is it a problem that gravity is so much weaker than the other forces?
  2393. The scope of inertial time dilation?
  2394. The Double Slit Experiment from a Photon Point of View
  2395. Relating SR time dilation and GR time-passage variation
  2396. C and frames of reference.
  2397. Local lorentz tranformations of fermion action
  2398. Time as a fourth dimension
  2399. change in internal energy => change in rest mass
  2400. Curved Space-time and Relative Velocity
  2401. A beam of light compared to bullet in gun
  2402. General relativity time dilation
  2403. Length Contraction Euclidean Space
  2404. photon beaming
  2405. A few simple questions about clocks moving slow relative to observers
  2406. Light has mass, and it travels at the Speed of light, so a massless object.....
  2407. Schwarzschild metric not stationary inside the horizon?
  2408. Diffeomorphism invariance and Noether's theorem
  2409. 2 spinning or orbitting objects and their effect on time
  2410. spherically symmetric metric form
  2411. Question about calculating time dilation of clocks at sea level
  2412. Are forces subject to the doppler effect?
  2413. satisfies Killing equation, but not a Killing field?
  2414. tensors from metric and its derivation
  2415. Traveling at the speed of light in orbit around a black hole
  2416. Maxwell's Equations in the Light of General Relativity
  2417. Cosmic Relativity
  2418. Moving though space but not time?
  2419. General Relativity and a Force Mediating Graviton?
  2420. EM and Gravity
  2421. Laws of physics are the same
  2422. The speed of light?
  2423. Rindler Horizon
  2424. Energy loss of a photon moving against gravity
  2425. Geodesics doubts
  2426. 3body decay and lorentz factor question
  2427. Bernouilli (ideal gas) method on Photongas? Components of light?
  2428. Time Travel and the Conservation of Matter Problem
  2429. Metric notation
  2430. Same old song and dance - special relativity
  2431. about relativity
  2432. Elementary question -- Special relativity
  2433. Geometric Description of SR
  2434. r=0 singularity
  2435. Speed of Light in Cesium Vapors
  2436. variation of quadratic action
  2437. General Relativity Basics: The Principle of Equivalence
  2438. Clock rates and effective ptotential.
  2439. Maxwell's equations in curved spacetime.
  2440. Why Is It Impossible To Reach The Speed Of Light?
  2441. GR with Riemannian (++++) metric?
  2442. Quick question about the speed of light.
  2443. Space-Time curvature? the units?
  2444. Please set me straight about velocity based time travel
  2445. Gravitational lensing paradoxon!
  2446. Does heat generate additional gravity
  2447. Help with GRT: Masses on a sphere
  2448. Light speed and time
  2449. Regarding quasars not showing signs of time dilation.
  2450. Motion in Spacetime (using internal forces), swimming/gliding.
  2451. How are the twins distinguished?
  2452. things that can't happen on a manifold
  2453. Time dilation due to relative velocity
  2454. name of the experiment
  2455. Length contraction and rod falling thorough a grate ?
  2456. Quick question - has length contraction actually been experimentally confirmed?
  2457. Question!! "About a light beam....."
  2458. Question about how time works?
  2459. second postulate of Special theory of relativity-help
  2460. Orthogonal diretion on the Minkowski diagram
  2461. Potentials, connections and curvature
  2462. maths of E=MC squared, please can someone explain the maths?
  2463. The opposite of the limit of light
  2464. Representation of covariant and contravariant vectors on spacetime diagrams
  2465. curved space/LP spaces
  2466. Maxwell and SR
  2467. Concerning reference frames
  2468. MTW: Exer. 8.12, pg. 215
  2469. time dialation
  2470. particle-like solutions?
  2471. gravity
  2472. Derivation of proper time in acceleration in SR
  2473. the main obstacle in learning relativity related theories
  2474. STV Gravity
  2475. Acceleration from radar info
  2476. conservation laws in GR: a messy picture?
  2477. Long Rocket
  2478. "Radius" of the Universe
  2479. Rindler coordinates
  2480. MTW: Exer. 8.11, pg. 215
  2481. Does my Thumb warp spacetime?
  2482. Why is there a C?
  2483. Resolve to the Twins Paradox – Frame of Origin
  2484. are the doppler effects of sound wave and light wave of different roots?
  2485. c=distance/time?
  2486. Is the wire necessary to create a B field?
  2487. A Rookie Energy Query!
  2488. GR Vacuum solutions
  2489. Questions about lights constant and photons
  2490. Question about length contraction (geometric way)
  2491. Hawking singularity theorem -- what if not all geodesics incomplete?
  2492. Is time constant?
  2493. Planck relation, relativistic doppler effect, and relativistic mass
  2494. Two travelers both in Inertial Frames
  2495. confused about time slowing down...
  2496. Relativity query - communication with an object at light speed
  2497. Alternative form of Minkowski metric?
  2498. A little bit of paradox
  2499. Travelling greater than speed of light
  2500. Reference Frames in Simultaneity
  2501. Questions for a physicist
  2502. Magnetic Monopoles and Gravity
  2503. Special Relativity Paradoxes
  2504. charged tachyons?
  2505. Derivation of Hyperbolic Representation from Lorentz/Minkowski equations in SR
  2506. Ehrenfest / rod thought experiment.
  2507. Center or mass in SR
  2508. Speed of light & streaming video!
  2509. path of light invertible
  2510. weight of scalar density
  2511. Muon confusion
  2512. experimental data in relativity
  2513. length contraction
  2514. REAL inertial motion???
  2515. REAL motion 2
  2516. Question about alpha, the fine structure constant
  2517. Time and Motion
  2518. Clocks falling into gravity wells
  2519. Special relativity on a circle
  2520. exceed the speed of light
  2521. Pi and Gravity
  2522. Multiple clock thought experiment
  2523. open question about accuracy of measurement and frame of reference
  2524. velocity of gravity wave
  2525. Special Relativity: Going from A to B on a helix
  2526. Tipler Cylinder
  2527. I understand time dilation with light clocks, but...
  2528. Counting independent components
  2529. The use of electromagnetic resonance to distort space time
  2530. Beginner's questions on time dilation
  2531. Relativistic mass affect weight of an object?
  2532. Speed of light in Non-Inertial reference frame?
  2533. conservation of energy predict invariance of elastic collisions?
  2534. relativity plus gravity
  2535. Information transfer that is faster than c?
  2536. Lorentz vs Spin Counter
  2537. Negative squares using the space time interval invariance
  2538. Reasons why lightspeed travel is impossible
  2539. Falling elevator
  2540. Basic question about the nature of light and time
  2541. Lorentz vs space time interval
  2542. Does flat spacetime actually exist around us?
  2543. Acceleration and Time Dilation
  2544. What is spacetime exactly?
  2545. General Relativity and Heisenberg Uncertainty
  2546. Energy vs wavelength for a photon in GR
  2547. Structure of a gravitational wave?
  2548. differing definitions of expansion, shear, and vorticity
  2549. General relativity breaks down at Planck scale
  2550. Mach's principle
  2551. Riemann normal coordinates
  2552. Can we "use" the Andromeda Paradox?
  2553. Gravitational waves are also redshifted?
  2554. Can anyone tell a good quotation about GR?
  2555. If it's all about frame of reference, does it matter how much stuff is in the frame?
  2556. Basic question about the speed of light
  2557. Einstein on Space
  2558. Dimensions of Spacetime
  2559. Voyager probes and time dilation
  2560. General Lorentz Matrix in Terms of Rapidities
  2561. Spaceship arriving at a planet
  2562. Local Lorentz frame
  2563. What is the difference between mass and energy?
  2564. Gravity wave detectors
  2565. Time dilation argument
  2566. Length Contraction
  2567. Time dilation and black-hole--black-hole mergers, and ringdown gravitational waves
  2568. Light in Elevator Question
  2569. Tidal Effects in the Schwarzschild Metric
  2570. Time dilation sonfusion
  2571. General relativity with infinite speed of light?
  2572. Currents in the Universe
  2573. relativity: light in train with person in it
  2574. e=mc^2
  2575. The Schwarzschild Metric - A Simple Case
  2576. Constancy of metric tensor components as a test of curvature
  2577. Faster than Speed of light
  2578. Does Gravitational Time Dilation imply mass change?
  2579. Einstein Field Equations???
  2580. The length of a falling elevator
  2581. Definition time
  2582. Wormholes?
  2583. Lorentz transformation
  2584. Balance of Forces - Electrostatic Force vs. Gravitational Force
  2585. Relativistic bike
  2586. Tensor transformation under reflections
  2587. Can SR handle acccelerating frames?
  2588. What Lorentz Covariant Objects Can You Name?
  2589. Einstein-Hilbert Action --> GR is a saddle point?
  2590. Time Distortion due to Mass
  2591. e.p. implies no gravitational shielding?; Feynman?
  2592. special relativity / orientation in space with photons
  2593. Special Relativity and Black Holes
  2594. Redshifting
  2595. relativistic work/energy
  2596. Relativity question(layperson level)
  2597. Simultaneity:Confused and almost confident about my own logic
  2598. Clarrification of Time Dilation
  2599. Help wanted with an explanation
  2600. Hypervelocity stars and RX J0822-4300
  2601. Metric Sign Convention
  2602. 'relativity' of radiation of uniformly accelerating charge
  2603. Dark Matter and Thorne's unlikely time travel
  2604. Relational Mechanics
  2605. Negative energy in special relativity
  2606. Maxwell's idea to measure aether
  2607. Newton and Galilei boosts
  2608. Time Travel: Make me a believer
  2609. Relative Time Question
  2610. freefall from Infinity
  2611. The Einstein and Ricci tensors
  2612. Gravitational Attraction of a Massive Particle
  2613. Light & Time
  2614. How do you envision a gravitational field?
  2615. Light clock with something else than light
  2616. Trying to understand time delineation
  2617. rotating black holes in Penrose diagrams
  2618. New to GR, having trouble with lagrangian calculation
  2619. Wrong picture of GRT
  2620. Weyl curvature and tidal forces
  2621. Needing a solid example of a composite mass value
  2622. Velocity needed for a certain change in time
  2623. Maxwell's Equations in a Medium
  2624. Light and gravitation
  2625. time dilation or length contraction
  2626. The Speed of Light - Nothing can go faster?
  2627. Another Way of Looking at Gravitational Time Dilation?
  2628. Is Minkowski space the only Poincare invariant space?
  2629. Question regarding inertia
  2630. Perihelion advance expressed differently
  2631. twin paradox and other things
  2632. Newtonian generalization of Komar mass
  2633. Any alternative "article" websites for students/teens?
  2634. Universe inflation faster than c
  2635. Irrelvancy of motion in C perspective
  2636. Absolute motion's point of reference
  2637. Does it even make sense to compare lengths? (Lorentz contraction = special case?)
  2638. why the minus sign?
  2639. On black holes and relativity.
  2640. Postulate Approvement
  2641. 4-vector addition
  2642. Time Dilation Scenario
  2643. GR/Hawking Radiation Contradiction
  2644. What Does "Anisotropic Effective Mass" Mean?
  2645. Light, gravity, and red shift.
  2646. Question from a light weight...
  2647. Propagation of light emitted in a direction opposite to the translation of its source
  2648. gravitational waves
  2649. vector potential in curved space
  2650. experimental tests of the stress energy tensor
  2651. Can you help me with this equality?
  2652. Gravitational acceleration VS the speed of light...
  2653. Does light slow down (relativistic) near a black hole?
  2654. velocity and redshift
  2655. Fermi Normal coordinates for an infalling observer
  2656. Local flatness of spacetime
  2657. Age-Changes Caused By Instantaneous Velocity-Changes
  2658. Can you fall into a non-accreting back hole?
  2659. Questions about Einstein SR interpretation
  2660. infinite mass?
  2661. Could someone explain the fourth dimension?
  2662. Pioneer Spacecraft
  2663. time dilation
  2664. gravitational redshift from doppler shift
  2665. Angular momentum in curved spacetime
  2666. antisymmetric metric
  2667. what is the exact change in frequency for an approaching object?
  2668. Krasnikov metric for wormhole
  2669. Traveling through space
  2670. I am missing something in the train paradox
  2671. Minkowski space metric space?
  2672. Blue shifted cosmic microwave background photons
  2673. Why are mass and energy related by the speed of light?
  2674. time dilation or time contraction?
  2675. most fundamental reason why boosts have to have L(-v)L(v)=I?
  2676. curvature of spacetime inside of stars and planets
  2677. "Opposite side" of GR
  2678. Synchronization of Earth clocks
  2679. no. of field equations and components or Riemann tensor??
  2680. why spacetime
  2681. Photons and time
  2682. Time dilation due to SR plus GR
  2683. Simple question about inertial frames of reference
  2684. Frames can really travel faster than light?
  2685. speeds faster than light
  2686. Why photons don't fall to Earth?
  2687. "Proper distance" in GR
  2688. Electromagnetic waves relativistic
  2689. Special Relativity (i'm confused)
  2690. Why do we specify chart image is open?
  2691. Light "hook" or tether..?
  2692. Relativity and Electrostatics
  2693. Grandfather Paradox
  2694. Twin paradox?
  2695. topological action (veirbein)
  2696. Time dilation dilemma
  2697. How do spinors differ from tensors?
  2698. What is 'Curvature' of Spacetime
  2699. alpha matrix
  2700. Confused about this blueshift/redshift "paradox"
  2701. Law conservation of charge relativistic
  2702. Equations of electromagnetic potentials
  2703. A simple experment
  2704. electromagnetic radiation
  2705. special vs. newtonian
  2706. time dilation in an acc. vs gr. field
  2707. force due to gravity vs force due to accelratio
  2708. well-motivated theories with nonzero PPN ζ?
  2709. Geometric interpretation of the spacetime invariant
  2710. Universe acceleration limit?
  2711. einsteins formula
  2712. which side?
  2713. Einstein's second postulate (one-way speed of light)
  2714. Simultaneity in General Relativity
  2715. Question about the theory of relativity.
  2716. Relative Length to Relative Volume
  2717. asymmetry in black hole formation, and a possible hand-wavy no-hair theorem
  2718. Near Light Speed/Time Travel
  2719. MTW Formula 25.38 Coordinate Time
  2720. where do I get?
  2721. Ricci tensor: symmetric or not?
  2722. How would this experiment play out? Length contraction / black hole
  2723. Possibility of Traveling Faster Than Light?
  2724. Local Poincare Transformation
  2725. Is General Relativity Time Symmetric?
  2726. Dual Manifold
  2727. Lanczos equation
  2728. extremal surfaces
  2729. Calculating the area of a sphere
  2730. Speed of light question
  2731. Faster than light? Faster than light! Faster than light...
  2732. Speed of light Described by relativistic mechanics
  2733. Einstein & Bended light ?
  2734. Speaking to an observer (stationary to you) via radio while moving at speed of light.
  2735. constant speed of light
  2736. Can Graphene/Nanotubes Change Mass?
  2737. Cauchy surface in globally hiberbolic manifold
  2738. traversing large distances
  2739. Faster than the speed of light?
  2740. Spacetime curvature
  2741. Photons "live" in a singularity?
  2742. The Origin of Inertia
  2743. Going crazy: can someone spot the error in this simple derivation?
  2744. Basic time dilation question
  2745. Theory of Relativity?
  2746. Negative Schwarzschild mass parameter?
  2747. Education in Relativity Theory
  2748. Light's constant speed and frames of reference
  2749. Rod shortening of General Relativity
  2750. let's say i'm in einstein's elevator
  2751. isn't it?
  2752. Ticking Clock and Pendulumn Thoughts
  2753. why do we treat earth and why does it work as an inertial frame
  2754. Barn-Pole Paradox Discussion
  2755. Expressing 4-potential as a Fourier integral
  2756. orthochronous transformations?
  2757. Spacetime and limit c->infinity
  2758. Lorentz vs Einstein
  2759. Looking to understand time dilation
  2760. Relativity and the conservation of momentum
  2761. Do photons create gravity?
  2762. Acceleration Questions
  2763. Does this make sense?
  2764. Time
  2765. Where laser beam will fall (see the attachment)
  2766. Newton's Third Law, Speed of Light, and Relativity question
  2767. Gravity question.
  2768. photons and and equivalent number of atoms on gravity
  2769. Einstein and Lenard in Bad Nauheim
  2770. Finding Components of the Christoffel Symbol
  2771. Triangle GR thought experiment
  2772. Trying to understand the Lorentz transformation.
  2773. spin of the photon
  2774. what are the meanings of highlighted term?
  2775. Major difference of Inertial and non-inertial frame of reference ??
  2776. Schwarzschild metric in 3-dimensional space-time
  2777. Do materials have temporal elasticity?
  2778. Einstein was wrong...you can beat the damn game...
  2779. A question about Gravity
  2780. Lorentz transformations of the angular momentum
  2781. definition of "black hole" for the purposes of no-hair theorems?
  2782. upper- and lower-index Levi-Civita tensor/symbol
  2783. On white hole
  2784. Gravity field equation for evaluations.
  2785. Faster than light?
  2786. When does Hawking radiation begin?
  2787. Metric for space-time in SR
  2788. Covariant derivative and geometry of tensors
  2789. Lemaitre coordinates
  2790. Shear stress in Energy-momentum Stress Tensor
  2791. Chasing The Impossible
  2792. choice of scaling function for Penrose diagrams
  2793. Time dilation paradox
  2794. local Minkowski space and free falling
  2795. Is there a maximum acceleration limit?
  2796. An issue I'm having with time dilation and other effects of speed
  2797. Question about spacetime
  2798. Dimensions and information content
  2799. Velocity addition ain't what it used to be
  2800. Orbit of Moons & Shapes of Planets due to Warped spacetime
  2801. The Theory of the Transverse Doppler Effect
  2802. What are valid coordinate transforms (diffeomorphisms)?
  2803. Can wormholes make you travel faster then c
  2804. Wormholes as space travel?
  2805. Events in different reference frames
  2806. Relativity and the arrow of time....
  2807. why faster than light is impossible?
  2808. Eddington Finkelstein coordinates in the Schwarzschild spacetime
  2809. definition of conformal maps
  2810. Doppler effect and the twin paradox
  2811. Why is the speed of light same in all reference frames?
  2812. existence of quasi-euclidean spacelike hypersurfaces?
  2813. gravity /electromagnetism /measuring
  2814. Why is light the fastest ??
  2815. Lorentz invariance and General invariance
  2816. What is the different between Minkowski Space an Semi Riemann Space?
  2817. Random General Relativity conceptual questions
  2818. Varitaion on the twin paradox that just doesnt work out for me
  2819. The Pioneer Anomaly and Vacuum Energy
  2820. coordinate singularities and coordinate transformations
  2821. Faster-than-light speeds
  2822. "No speedometer"
  2823. Simultaneity for entangled particles
  2824. Question from Weinberg's cosmology text
  2825. Lorentz factor for slow speeds
  2826. General Relativity Effective Potentials
  2827. Event horizon: light delay and grav. time dilation
  2828. third derivative of quadrupole moment as source of radiation
  2829. A question from Rindler Relativity Textbook
  2830. acceleration of a circulatory particle
  2831. Reference that explains general relativity
  2832. Einstein needs to show his work
  2833. SR time dilation problem
  2834. Relativity of simultenieaty
  2835. Gravity curvature and graviton
  2836. Conceptualizing travel toward a light source
  2837. Degrees of Freedom
  2838. Question about length contraction
  2839. massless Klein-Gordon equation not conformally invariant??
  2840. Extremely large light clock
  2841. Paradox within the twin paradox
  2842. Covariant quantities in GR
  2843. What would reality be like without SR?
  2844. SR length contraction question
  2845. Conditions for spacetime to have flat spatial slices
  2846. The speed of light in a gravitational field
  2847. Does gravitational mass change during collapse?
  2848. Chern-Simons form
  2849. On Covariance and Invariance
  2850. Special relativity:Reality or measurment error(?
  2851. Volume element as n-form
  2852. angle in special relativity
  2853. General relativity and tides
  2854. How does light from the past ever reach me?
  2855. Do you know how to derive the General Theory of Relativity?
  2856. Dynamics of the Slowly Accelerated Electron from Einstein's original SR paper
  2857. proposal for measurement of Lens Thirring effect
  2858. Are these mistakes?
  2859. Yet another Twin Paradox thread
  2860. What are the units of vectors and dual vectors?
  2861. Why Two Defs of Four-Momentum?
  2862. speed of light relative to what?
  2863. Will two clocks be synchronized after a period of time dialation?
  2864. Surpassing the speed of light?
  2865. Is clock become slower or faster
  2866. Expression of Gravitational Potential in GR
  2867. A descriptive picture of radar simultaneity
  2868. Initial frame
  2869. empirical test of Einstein's famous goof
  2870. Concession
  2871. Transitivity condition for Einstein synchronization and the one-way light speed
  2872. Matter and time (travel)
  2873. Dirac brackets and gauge in special relativity.
  2874. Mass equivalence and instantaneous gravitational field
  2875. Solving for g_φφ=0 in charged/rotating BHs
  2876. Gravitons not required?
  2877. Stress-energy tensor
  2878. mathematical explanation of maximum speed limit "c'
  2879. Regge Wheeler Equation
  2880. slowing light down?
  2881. Special relativity adandons Maxwell's mechanical interpretation of EM?
  2882. Measuring procedure for Fermi Normal coordinates
  2883. Tensor contraction
  2884. Relativistic Mass and Electrons vs. Muons
  2885. On "when does Hawking radiation begin?"
  2886. Speed of light dilemma
  2887. Has General relativity been proven wrong ?
  2888. Is relativistic mass not an appropriate concept?
  2889. Past Present and Future
  2890. Tapping a message over lightyears in an instant?
  2891. Where does the Einstein-Hilbert action come from?
  2892. Deriving the equations of motion in f(T) gravity
  2893. Kinematic theory and arbitrary coordinatization
  2894. -ictan(alpha)
  2895. Can general relativity be constructed with differential forms?
  2896. On a spinning wheel
  2897. d'alembertian of lorentz transformation matrix
  2898. Source distribution
  2899. Hawking Radiation
  2900. Principle of Equivalence
  2901. De Sitter Space-Time Geometry
  2902. E on q independent of v - confusing?
  2903. Question on solid vs light
  2904. A few questions about the einstien field equations?
  2905. The form of the lorentz transformations
  2906. ADM Mass for a diagonal metric
  2907. Consequences of the Equivalence Principle
  2908. Question about Space & Time?
  2909. general metric with zero riemann tensor
  2910. Relativistically Invariant Tensors
  2911. length contraction, light speed and a bomb
  2912. Contradiction in Relativistic Simultaneity in Taylor-Wheeler Spacetime Physics?
  2913. Decreasing Space-Time Density
  2914. Layman's question about the application of the curvature to space
  2915. How did Einstein come to the conclusion...
  2916. please clear up math
  2917. Contradiction in Taylor-Wheeler's example of spacetime invariance
  2918. If the universe is expanding faster than light, gravity doesn't exist everywhere?
  2919. Frame dragging question.
  2920. Magnetic or Electric Field or Electromagnetic Field?
  2921. The Big Bang singularity - does it have infinite energy?
  2922. The Plane Electromagnetic Wave in Vacuum
  2923. Infinite brightness in the singularity?
  2924. Time shear in a rotating body.
  2925. Installing GRTensorII in Mac
  2926. Question about Big Bang and Black Holes
  2927. Actual earth measurement contradicts measurement predicted by special relativity
  2928. Black-hole complementarity
  2929. The Schwartzschild solution - why no Stress Tensor?
  2930. Why perihelion shift and not aphelion?
  2931. Tension in slowly rotating cylinder in gravity
  2932. I don't understand the result of my Earth-muon calculations
  2933. pedagogically direct demonstrations of SR and GR
  2934. Rotation of a vertical cylinder in a gravitational field
  2935. Trying to understand Relativity
  2936. A question about light speed
  2937. Linearity of Lorentz transformations
  2938. Time dilation and stem cells therapy
  2939. red-shifting
  2940. Time dilation formula for constant acceleration on a circular path
  2941. Why there is space-time
  2942. 2m car near lightspeed fall into 1m hole?
  2943. Gravity and mass in General Relativity
  2944. Impossibility of Backwards Time Travel
  2945. The WHY of speed of light vs. the FACT thereof
  2946. Electron-positron pair production
  2947. Two dimensional anti de Sitter space without cosmological constant?
  2948. Near Light Speed Travel & Time Dilation... I don't get it.
  2949. Tolman versus Recami: tachyons
  2950. Black Hole time dilation + biological paradox
  2951. Thread on Lorentz Invariance Violation
  2952. What happens in this scenario? (Poll)
  2953. Solutions to Killing's equation in flat spacetime
  2954. Does gravity REALLY pull on light? Really?
  2955. Is light bound to travel at C?
  2956. Curvature in space time ? Gravity
  2957. Are there any energy change of photon in different frame?
  2958. Device to measure curvature of spacetime.
  2959. Confused about moveing through time
  2960. Does light really travel in same frame of reference
  2961. Some help understanding the metric tensor
  2962. Number of nontrivial components of thin shell equations
  2963. Do Black Holes Grow?
  2964. Faster than the speed of light
  2965. Mass of Earth/Sun
  2966. Michelson interferometer and Doppler effect! Having a brainfart
  2967. Problems in general relativity
  2968. looking for Lagrangian Systems with Higher Order Time Derivatives in the Lagrangian
  2969. On the Electrodynamics of Moving Bodies
  2970. The strange world of Phil the photon
  2971. Time Dilation Question
  2972. Could you use contained light as a form of propulsion?
  2973. Time Dilation Paradox
  2974. Relative speed and gravity?
  2975. Space Travel Scenario
  2976. Can anyone tell me where to look for an explanation of this equation? (EG DM-decay)
  2977. Negative moving coordinates and Time Dilation
  2978. Both think the other's time is slower Paradox
  2979. How Clocks (Seemingly) Ruin Everything
  2980. Rest mass ? What on earth ?!!
  2981. Relativistic Acceleration
  2982. relativity of simultaneity help
  2983. Understanding accelerated frame in general relativity
  2984. "Locally Lorentz"
  2985. Preserving Magnetic Polarity in a Revolving Reference Frame
  2986. If I was traveling at 51% the speed of light...
  2987. Has Special Relativity really been proven?
  2988. Acceleration vs Gravity and effect on time/clocks
  2989. Time Dilation Vs. Length Contraction
  2990. asteriod vs earth
  2991. Contortion tensor
  2992. Relativity Concepts
  2993. velocity addition expressed as gamma
  2994. FTL Possible?
  2995. Can someone please explain to me what the Christoffel symbols symbols are?
  2996. Is the presence of 'c' in E=mc^2 coincidence?
  2997. GR by Einstein himself
  2998. Relativity:Changes and Extensions
  2999. twin paradox initial acceleration
  3000. What is the best way to be a relativist ?
  3001. Gravity and curvature
  3002. Can you accelerate faster than the speed of light?
  3003. Geodesic equation via conserved stress tensor
  3004. Timelike geodesic equations for the Schwarzschild metric
  3005. Time Dilation Light Clock Example
  3006. Sources of gravity
  3007. Gravitational Analog to Maxwell's Eq.
  3008. Dark energy & pressure
  3009. World line problem
  3010. Mass-energy equivalence.
  3011. Mermin's geometrical approach to SR
  3012. SR Momentum
  3013. Question about Black Holes and Speed
  3014. Einstien field equation calculations
  3015. Coordinate transformation and metric tensor
  3016. Derivation of Energy-Momentum Relation WITHOUT using relativistic mass?
  3017. A study of the motion of a relativistic continuous medium
  3018. Coordinate Systems: GR vs Newtonian
  3019. Independent equations and initial conditions in GR
  3020. rest energy
  3021. Am I taking crazy pills or is Einstein missing a factor of gamma?
  3022. How much matter can you put in space and time?
  3023. Mass-Beam behaviour
  3024. The Stress part of the Stress - Energy - Momentum Tensor
  3025. Functional derivative of connection with respect to metric
  3026. NOOB Question
  3027. From Equivalnce Principle to General Relativity
  3028. simple question about geodesics
  3029. switching roles
  3030. An absolute time clock!
  3031. Does general relativity give curvature a magnitude?
  3032. General Question on Schwarzschild Metric
  3033. The space-time interval
  3034. Most power gravitational wave sources
  3035. Is this a type of Horizon?
  3036. Special relativity Only Valid Under Handpicked Conditions?
  3037. E=MC2- question
  3038. A new type of black hole?
  3039. On the Physical Separation of Time
  3040. Question about twins
  3041. Simple Question On Relativity
  3042. Time Travel and Free Will
  3043. Gravity time dialation and acceleration?
  3044. Proof of GR
  3045. Could an observer prove he is in a CTC?
  3046. covariant derivative in spherical coordinate
  3047. Why universal space?
  3048. cosmological constant
  3049. Project in general relativity
  3050. Gravitational waves due to acceleration
  3051. E=mc2 | If something has near zero mass, can it move?
  3052. Lorentz tranformations and time slices
  3053. Gravitational Time Dilation
  3054. Michelson–Morley experiment using objects with mass?
  3055. Is Relativism due to Doppler in Mermin's book?
  3056. Time dilation problem
  3057. The feeling of time while traveling at the speed of light
  3058. Clarification on light speed experiment
  3059. curved or non-curved space, what is more fundamental?
  3060. What happens when a null geodesic splits in two along a path moving forward in time?
  3061. Important and/or Interesting Spacetimes
  3062. Lorentz Transformation
  3063. the 4th dimension?
  3064. problem in equilance
  3065. On the Nature of ds[in GR]
  3066. Link between Thermo and Special Rel???
  3067. Magnetism
  3068. Gravity & Time
  3069. Rotating vs. Stationary Mass Grav Effects?
  3070. length and time comparisons in SR
  3071. Question about simultaneity
  3072. Metric tensor of a non-homogeneous universe
  3073. WIKI and Time Dilation
  3074. Relativistic inelastic collisions?
  3075. faster-than-light newbie question
  3076. No agreement on distance?
  3077. Components of 4-momentum
  3078. If Two Spaceships close at a speed of 1.4c...?
  3079. Time dilation
  3080. Solving Einstein Field Equations for Minkowski Space with CTC
  3081. newb ques: relation between Einstein's accelerating frame model and the graviton?
  3082. Question about Brian Greene's book
  3083. A cart with a light clock
  3084. Distance Perception in SR
  3085. Michelson–Morley experiment?
  3086. How to measure the one way speed of light.
  3087. Question about black holes and gravity
  3088. Gauss gun propulsion
  3089. Lorentz invariance and GR
  3090. Time dilation question for a sci-fi story premise
  3091. In E=mc2, Why C?
  3092. Question about Killing vectors in the Kerr Metric
  3093. Picturing Ricci tensor
  3094. Is time in our universe absolute?
  3095. What are the best lines of reasoning for why nothing can travel faster than c
  3096. Equivalence principle?
  3097. Relativity and Gravity
  3098. Gravitational redshift and observer/emitter
  3099. Relativistic Degrees of Freedom
  3100. Testing whether gravity bends light
  3101. space-time puzzle
  3102. Interacting gravitational fields
  3103. Time and distance
  3104. time dilation in horizontal clock
  3105. Could gravity be described as distance compression?
  3106. How to make two frames purely Galilean
  3107. Derivation of eq of motion of q in static E?
  3108. Tensor Rank of Stress Tensors
  3109. Aberration of starlight due to....
  3110. Why did Michleson assumed that ether is moving ?
  3111. Coordinate radius [r]
  3112. What are physics constant in Kerr metric?
  3113. Relative Information and Time Paradox?
  3114. N-body problem simulation and relativity
  3115. Wrong example of Covariant Vector
  3116. MMX and the earth's rotational sagnac
  3117. Holographic principle and entropy mapping of a BH
  3118. Foliation of Space Time Hypersurfaces
  3119. Energy conditions in GR
  3120. Riemann curvature tensor for some metric
  3121. How can two distant objects influence each other at a distance
  3122. Is kinetic energy determined by spacetime structure?
  3123. charged black hole
  3124. Hawking Radiation seems contrary to black hole dynamics
  3125. Gauge theory of gravity
  3126. How to send a faster-than-light signal (spot Paradox)?!
  3127. Black Hole Question
  3128. Alcubierre Drive
  3129. Is it possible that all black hole singularities are actually the same singularity?
  3130. Speed of Light
  3131. Evolution of generalized coordinates in canonical approach to GR
  3132. What is the EM Lagrangian in curved spacetime?
  3133. vierbeins and spin connections as gauge fields of gravity
  3134. Commuting the Lorentz transformation with derivative
  3135. living beyond possible
  3136. problem with light simultaneity..
  3137. An Easy Metric for Einstein Field Equations
  3138. Killing Horizon
  3139. How does light know which path to take ?
  3140. time dialtion
  3141. Lorentz Transformations, help me grasp them?
  3142. strange character of space-time !
  3143. meaning of the word topological
  3144. Does gravity slow time's passage?
  3145. Falling into black hole
  3146. mass term inside a metric
  3147. Special Theory Of Relativity
  3148. Fundamental question
  3149. Einstein's Field Equations and Poisson's Equation
  3150. Why does time dilation apply for objects moving with a velocity less than c?
  3151. Intergalactic space travel and hydrogen "blasting"
  3152. semi-colon vs nabla notation
  3153. On the interpretation of a spacetime diagram
  3154. Spacetime inside Quantum Vacuum or vice versa
  3155. Twin Paradox revisited
  3156. FRW metric symmetries
  3157. Circular path laser and frame dragging
  3158. LHC radial and tangential proton g-forces
  3159. Gamma as a Jacobian of Lorentz transformations
  3160. Energy continuity equation
  3161. Gravitational Waves and Speed of Light
  3162. Another gravity wave question...
  3163. Relativity and the mass of photons.
  3164. Gravitomagnetism & Gravitational Waves
  3165. SR and electric fields
  3166. Speed of Light - Highest Possible Speed?
  3167. Cause and effect
  3168. Where does -(ct)^2 come from?
  3169. Photon to electron + positron
  3170. purpose of Michelson-Morley Experiment?
  3171. contradiction in relative simultaneity
  3172. path that extremizes interval computed with polar coordinates metric in flat space
  3173. Energy In The Universe
  3174. Tachyons
  3175. Gravity - an accelerating frame paradox
  3176. Two Starships
  3177. Time dilation on a proton
  3178. Gravity effect on observed speed of light
  3179. Whose clock is really slower?
  3180. Relativity of Simultaneity and wave/particle duality.
  3181. Why do singularities mean that GR "breaks down?"
  3182. Circular orbits in SR
  3183. Kaluza-Klein model
  3184. Does a photon have a frame of reference?
  3185. how
  3186. Explanation of tidal wave formation in sea due toe gravitaion force of moon
  3187. Is spacetime a matter?how can this matter be detected?
  3188. length contraction (no calculations)
  3189. A problem of congruency
  3190. Does empty space move? What are the laws that govern its motion?
  3191. Maxwell's equations in general relativity
  3192. Self-replicating fields in EM radiation?
  3193. Fast then light experiment
  3194. Interpreting Gullstrand-Painlevé Coordinates
  3195. Confusion wiht Curvature Tensor
  3196. Scalar Curvature, R, for Dummies
  3197. Need Help!
  3198. laser and GR
  3199. Help!
  3200. If correct: a catastrophe in the Lorentz transformation
  3201. Lorentz and Poincare Groups
  3202. I can't understand time dilation in absence of absolute motion.
  3203. Small problem with getting to E=mc^2
  3204. Mass addition due to gravitational acceleration
  3205. Time Dilation or Mass Dilation
  3206. A noob asking about relativistic kinetic energy.
  3207. Mass motion and time
  3208. Killing Vector Question
  3209. light clock question
  3210. Relative force
  3211. Relativity of simultaneity and cosmology
  3212. Again on twin paradox!!
  3213. Gravitational redshift formul
  3214. variability of the speed of light
  3215. Timelike and lightlike/null vectors
  3216. From what frame of reference does the Earth orbit the sun?
  3217. Tachyon properties.
  3218. How does light bend under gravitational field(gravitational force), why?
  3219. Time dilation and simultaneity: easier to see with a train
  3220. Pioneer 10 Anomaly
  3221. Equivalence principle
  3222. Speed Limit of causal influence
  3223. Why are electric field lines straight around electrons moving at relativistic speed?
  3224. Relativistic Soap Bubbles
  3225. Rest Length, Coordinate Length, and an argument for True Length
  3226. What happens if an Alcubierre warp drive fails?
  3227. Proper Time
  3228. Christoffel symbols vanishing on a curve
  3229. Affine parameter Schwazschild
  3230. Entanglement
  3231. Covariant derivative of an anti-symmetric tensor
  3232. Reissner-Nordström metric for magnetic fields
  3233. Wormhole
  3234. SR and QED: how??????
  3235. Acceleration is perpendicular to velocity
  3236. Problem with relativity of simultaneity original example
  3237. Authors of Relativity
  3238. Beginning learning Relativity
  3239. A Simple Time Travel Question
  3240. Even...light would take an infinite time...
  3241. LHC forces on a proton
  3242. Photons and speed
  3243. Lie Groups
  3244. Does light itself bend spacetime?
  3245. Is Einstein synchronization trivially true?
  3246. free float through the event horizon
  3247. Faster than the speed of light during acceleration?
  3248. Einsteins Vs Newtonian Solution
  3249. Constatly accelerating spacecraft
  3250. fast moving batteries
  3251. Lorentz transformation
  3252. Perihelion precession of Mercury
  3253. Expansion, redshift, energy loss
  3254. What would actually be observed during Lorentz contraction?
  3255. The experience of the infalling body of an EH
  3256. Paradox!
  3257. Why does General Relativity break-down at Plank Temperature?
  3258. Some tensor confusion
  3259. Help understanding a relativity train
  3260. What are the 26 dimensions in the M theory?
  3261. Reissner- Nordstrom metric- weak energy condition
  3262. Acceleration from curved spacetime
  3263. relativistic correction for gravitational acceleration
  3264. Time deviation inside the Sun
  3265. How does QFT address the problem of Locality in Quantum Entanglement?
  3266. Why can't light escape black holes?
  3267. The logic of information travel.
  3268. induction paradox
  3269. The Mass of Light
  3270. Does the formation of a black hole start with QM?
  3271. Improper Lorentz transformation
  3272. Gravitational Collapse of a Cylinder
  3273. Question on weak field approximation
  3274. mass energy equivalence
  3275. Spacetime, gravitational force
  3276. Parallel light beams converge?
  3277. Does Einstein's Theory of Relativity Substantiate the idea of Time Travel?
  3278. Time to hit singularity
  3279. Zeno, Stadium and SR
  3280. EM stress-energy tensor
  3281. Relativity of Simultaneity: Train-Platform Experiment
  3282. Positions of the planets
  3283. time travel
  3284. Proper Length, Time
  3285. Einstein GR is dead, viva Einstein-Cartan Gravity?
  3286. Have a question about speed of light
  3287. More questions about relative speeds.
  3288. Question about the GR gravitational redshift experiment
  3289. Black Holes - Scientific Literature
  3290. Density of an object in Relativity
  3291. Frame dragging from a light beam
  3292. Landau & Lifschitz, "Classical Theory of Fields"
  3293. Another question on FTL and time travel
  3294. Clocks at different altitudes
  3295. Condition for a particle to move relativistically
  3296. Does the metric have to be symmetric? Why?
  3297. Is mass vary with velocity?
  3298. Is it possible rapid increase impact account for perception of time dialtion?
  3299. Covariant and Contravariant Vectors
  3300. Transformation law in curved space-time
  3301. Growing Block Universe
  3302. E & M Magnetism Relativity "Paradox"
  3303. Simple SR
  3304. Single positive electric charge in a closed universe
  3305. Schwartzschild exterior and interior solutions
  3306. Thought Problem Clarification
  3307. MMX in water
  3308. Can someone please explain "negative energy" to me?
  3309. Causal structure of spacetime: intuitive reason for non-compactness?
  3310. Killing vectors of minkowski space
  3311. Special Relativity: Theoretical Questions
  3312. "Velocity" of our universe through time?
  3313. Rotation
  3314. Clarification of Concepts
  3315. Graph of Twin's Time Dilation
  3316. Curvature of space
  3317. contemplating Time Travel
  3318. Field lines in expanding space.
  3319. Light Cones
  3320. One more time on Hawking radiation
  3321. Need help understanding time dilation
  3322. Intersection of bars moving at v>c
  3323. t constant lines in Minkowski Conformal Diagram
  3324. Does incurvation of space requires energy?
  3325. Do all observers agree on the age of our Universe?
  3326. two questions in one
  3327. How would two massive bodies effect eachothers gravity?
  3328. update on Devasia
  3329. Length contraction from lorentz transformation. Keep messing up the proper length
  3330. Bending of Light
  3331. EM Differential Form version of Lagragian
  3332. Explaining Photon Redshift?
  3333. WMAP Data Redshift and Background Radiation
  3334. Derivation of space-time interval WITHOUT Lorentz transform?
  3335. Calculus of Variations in General Relativity
  3336. The case for True Length = Rest Length
  3337. Speed of light /time / and material
  3338. "Large" diffeomorphisms in general relativity
  3339. Charged black holes
  3340. Gravity constant
  3341. Proof of Length contraction
  3342. general covariance and tensors
  3343. is timedailtion dialtion takes place wth obsrver on earth observing highspeed rocket?
  3344. Is the garvitay depend upon medium and is gravitaion force is quantized?
  3345. Is there any materials on Null Electromagnetic Field?
  3346. (noob thread) Expression for the Relativistic Doppler Effect at Arbitrary Angles)
  3347. Just a question about light speed
  3348. Question regarding time dilation, inertial motion, and acceleration due to gravity
  3349. How to calculate the contraction of metric tensor g^ab g_ab
  3350. Simplest way of deriving Lorentz transforms
  3351. Confusion in Simple derivation of the lorentz transformation
  3352. opinions on red shift?
  3353. Relativistic momentum
  3354. Appendix 1, Simple Derivation
  3355. Surface gravity
  3356. Conformal diagrams
  3357. Relativistic centripetal force question
  3358. The schwarzschild solution
  3359. Easy Lorentz Transform Problem
  3360. upper limit on rotation of the universe
  3361. Questions on the nature of Speed of Light..
  3362. The view of the naked ring singularity
  3363. Frame velocity v. object velocity in derivation of 4-velocity
  3364. Ultimate size of the Universe (finite)
  3365. Warping of space?
  3366. Is the 4th dimension Time
  3367. Is atom created if time is taken away from space and acceleration?
  3368. c represents the speed limit of the universe rather than the speed of light
  3369. Why is there a universal speed limit, c, and why is it what it is?
  3370. On conserved energy in GR
  3371. Troll physics
  3372. General Relativity is pure Mathematics
  3373. polarization states via relativistic effect
  3374. Discrepancy regarding time measurement
  3375. coordinate transformations in gr
  3376. Negative mass Schwarzschild
  3377. Gravitation and Information, BH paradox
  3378. derivative of metric tesor and its trace
  3379. derivative of metric tesor and its trace
  3380. A good video explaining time dilation
  3381. I think my Prof did this wrong, Need Help Please
  3382. proving that the sphere cannot be expressed in "flat coordinates"
  3383. Big trouble with Kerr solution
  3384. How much is space bended at the surface of the sun
  3385. Neo-Lorentzian framework
  3386. Mechanism of gravitational acceleration in GR
  3387. metric covariant derivative
  3388. Is it really possible to solve for how fast an apple will fall on earth with GR
  3389. why is max speed, speed of light?
  3390. Units in GR
  3391. Where does a radially falling test particle cross the inner horizon of RN BH?
  3392. ligth in curve space
  3393. More detailed discussion on star collapse
  3394. Difference between acceleration and gravitational field?
  3395. Why do we perceive time to pass at the rate that we do?
  3396. Speed of Gravitational Waves
  3397. What is Newman Penrose Formalism?
  3398. Time Measurement (revisited)
  3399. B-E,F-D Statistics and the Lorentz Transformations
  3400. Is time dilation relative, or absolute?
  3401. The Lorentz Transformations and the Uncertainty Principle
  3402. How to be an Inertial Observer?
  3403. Time dilation light clock?
  3404. Gravitational field in GR
  3405. Rest Mass and Preferred Frame of Reference
  3406. Mass dilation question
  3407. neutrino at rest
  3408. Time dilation and length contraction
  3409. Einstein's Theory of Special relativity
  3410. Constancy of speed of light and galiliean transformation
  3411. Gravity is Time?
  3412. diffeomorphism and constant curvature
  3413. 'Mass' of an object at different positions in a weak gravitational field
  3414. Gravitational pull (revolutions)
  3415. Space time interval
  3416. Physical implications of not-smooth metric derivative matching
  3417. is gravity a force
  3418. Surviving the event horizon: some thoughts
  3419. What Action leads to GR?
  3420. Can someone please explain to me why massless particles follow null geodesics?
  3421. Mermin's (Special) Relativity without Light
  3422. Taking derivative of the metric
  3423. Linear FE for static, spherical body
  3424. Advanced/Retarded Eddington-Finkelstein Coordinates and Incident/Outgoing Wave
  3425. "mass" of electromagnetic waves
  3426. E = Pc?
  3427. Bel decomposition in 6-d
  3428. relativity and light speed
  3429. Is the speed of light actually constant or just always measured to be the same?
  3430. Uniform Motion
  3431. Having trouble writing down a metric in terms of metric tensor in matrix form?
  3432. Scenario in an attempt to understand relativity
  3433. Precession of Mercury’s Orbit
  3434. Galilei, Poincare and conformal symmetry
  3435. Do Total Current and Total Charge form a Lorentz Covariant Vector.
  3436. How to obtain Kerr Metric via Spinors (N-P Formalism)
  3437. Antigravity in General Relativity
  3438. Faster than light travel: it either constantly happens or never
  3439. Question about event horizon and Rindler space
  3440. Light Clock
  3441. Cause of Gravity
  3442. Clock acceleration
  3443. Reissner-Nordström repulsion
  3444. Gravity can still be caused by force?
  3445. The origin of the inverse square law
  3446. Merging to two BH
  3447. Gravitation of moving objects
  3448. Time dilation yes, why no contraction?
  3449. Space Probe vs the Sun - Relativistic Frames of Reference
  3450. PSR J0737-3039 Frame-dragging effect
  3451. Fizeau. What is connection between fringe shifts and velocity?
  3452. Invariant quantities
  3453. gravitational mass defect, weyl metric
  3454. What happens to density as speed increases?
  3455. Mass increasing with energy
  3456. dynamics of self-gravitating dust
  3457. If Earth's orbital speed doubled, would its mass and gravity double?
  3458. Angular velocity and c: Is this a paradox? Can you explain it?
  3459. Schwarzschild vs Gullstrand–Painleve and event horizons
  3460. Kinetic energy and curved space-time
  3461. Schwarzschild Killing Vectors
  3462. How does the length contraction work for proper length?
  3463. Riemannian Geometry is free of Torsion. Why use it for General Relativity?
  3464. Spacetime curvature: Real or Not?
  3465. Special relativity help
  3466. Lorentz Invariance as local limit of Bigger Manifold
  3467. Length Contraction causes Time Dilation?
  3468. The Big "G"
  3469. Mass a bend in space?
  3470. Aberration of light
  3471. Can X4 Be Regarded as Spatial?
  3472. Hair brained, universal mapping theory (nonsense ?)
  3473. Amplitude of wave stretched as well as red shift?
  3474. Is gravity a bigger mystery than charge?
  3475. Speed of Gravity.
  3476. The part of relativity I never got, reference frame
  3477. Simultaneity in General Relativity and Problem with coordinate systems concepts.
  3478. Geodesics on a cone in flat space
  3479. Lorentz Invariant Vectors and Grammatical Errors
  3480. Diffeomorphism Invariance in GR
  3481. A oarticle traveling at c is length contracted to what?
  3482. gravity as an emergent phenomenon
  3483. Length contraction Griffiths
  3484. Invariant tensors and motions
  3485. Can gravitational influence be measured?
  3486. Is this at all possible?
  3487. If light has no weight, how can it push objects?
  3488. SLAC electron masses
  3489. Reconciliation of GR and QED
  3490. my train paradox
  3491. Second fundamental form
  3492. Mass inflation exactly equals time dilation?
  3493. Inertial Frames in Relativity
  3494. Is the magnitude of the Lorentz force always the same in different inertial frames?
  3495. Planets in Revolution
  3496. Angular momentum conservation.
  3497. Acceleration of Light:Density of Space
  3498. Radial Motion in Schwarzschild's Geometry
  3499. If two trains traveling at 0.5c collide head on...
  3500. Hawking radiation, BH entropy and so on in Kottler spacetime
  3501. Theoretical question
  3502. Do I have time dilation right?
  3503. Accelerating trajectories in relativity
  3504. Relativity Question
  3505. Space time distortion grid representations
  3506. If you were traveling in a spaceship that had a velocity JUST under light speed...
  3507. 12 year old autistic savant claims theory of relavitiy is wrong
  3508. How Do The Definition Of Inertial In Relativity Relate To General Mechanics
  3509. Pioneer anomaly solved
  3510. two black hole question
  3511. gravity = warping of spacetime (doesn't make sense)
  3512. Tensor algebra with derivative of the metric
  3513. Happy April 1st
  3514. Nullity of wave 4 - vector for grav. plane wave
  3515. Twin paradox, what about ageing?
  3516. Time elapsed for observer (from POV of Traveler)
  3517. The Speed of Gravity
  3518. Special Relativity and Enganglement
  3519. simple relativity question [two ships]
  3520. Backward Time Causation in Superluminality
  3521. Tortoise-like coordinate transform for interior metric
  3522. General relativity and jet travel makes you fat?!
  3523. Parallel transport
  3524. Visualising numerical solution to geodesics in some metric
  3525. Relativity Theory TEST
  3526. Relativistic Resistances
  3527. Accelerating to the speed of light
  3528. Simple relativistic harmonic oscillator
  3529. Any good references of Petrov Classification?
  3530. Help learning SR
  3531. newtonian limit to schwarschild radial geodesic
  3532. Time dilation problem
  3533. Tensor questions
  3534. Mach's principle and boundary cases
  3535. Differentiating Tensors
  3536. Why do need Gravitons?
  3537. Spacetime doesn't really exist does it?
  3538. Does this scenario disprove relativity?
  3539. GR in all frames of reference
  3540. Just wonder, why torsion is neglected in EFE?
  3541. Does the frequency of light change as I travel toward it?
  3542. Does the clock aboard a GPS ...
  3543. Velocities - how relative are they really?
  3544. Distances define geometry
  3545. How can Block Holes form in finite time?
  3546. Relativistic optics
  3547. Manifold / Atlas / Chart (Building Simple Example)
  3548. A dimensional problem in relativistic mechanics
  3549. Time at Big Bang
  3550. Is there any good reference of tetrad in GR
  3551. Mathematical Skills for Understanding General and Special Relativity
  3552. Hawking Radiation w/out black holes
  3553. Wald: Ch. 2, Problem 8.b
  3554. Time and Space Time
  3555. General questions about relativistic derivations and deductions
  3556. Are the forces of gravity subject to the Doppler effect?
  3557. Can you turn a black hole inside out with charge?
  3558. Einstein's June 30 1905 paper - help please with the maths
  3559. Creating a black hole with any mass?
  3560. Trying to understand what extremal proper time means.
  3561. Singularities, Density, and the Planck Length
  3562. The speed of light with an accelerating observer.
  3563. Properties of curvature tensor in 3 dimensions?
  3564. Question regarding light clocks and time dilation.
  3565. Does a Blackhole form Simultaneously?
  3566. Time and Light speed communication
  3567. Question about time dilation in the schwarzchild metric?
  3568. Experimantal verification of GR
  3569. Tachyon - assymetry between space and time
  3570. Twin Paradox (thorough explanation needed)
  3571. Dokuchaev, "Is there life inside black holes?"
  3572. Time Dilation Puts Two Observers at different Times?
  3573. Falling into a black hole and then shining a light?
  3574. Classical Field Theory without Force
  3575. What would be the physical consequence of a non-metric connection?
  3576. Metrics, +++- vs +++--
  3577. [Novice] Why isn't Time Space?
  3578. Contraction in the Riemann Tensor
  3579. Gravitational self-energy
  3580. ISV VentureStar (Avatar): acceleration problem
  3581. Silly time dilation question
  3582. [Novice] Infinite density.
  3583. Stuck on kinetic energy.
  3584. Equation for acceleration in MTW
  3585. Rindler Observer
  3586. Time Dilation
  3587. speed of light not a legitamate factor in relation to mass
  3588. A critique of Mike Fontenot's CADO scheme
  3589. doubt about gravitational waves
  3590. General Tensor contraction: Trace of Energy-Momentum Tensor (Einstein metric)
  3591. Writer needs help
  3592. CADO Cartoon ...
  3593. Nonrenormalizability of GR
  3594. Question About Inertial Frames
  3595. Conservation of Energy Down The Drain?
  3596. Solutions to Field Equations with Einstein Tensor = 1
  3597. The Affine Connection components
  3598. Geodesic Motion for the Gödel Space-time
  3599. Falling into a black hole
  3600. The End of the Universe in an Instant
  3601. relativistic rotational kinetic energy
  3602. size of observable universe in two simple cases -- this this right?
  3603. When people talk about the current size of the observable universe...
  3604. Maximum Occupation of Spacetime
  3605. Distance between two points in spacetime
  3606. Einstein's theory
  3607. Finding Co-frames in GR
  3608. Anti-Gravity from Matter-AntiMatter Repulsion
  3609. Inflation and Gravity
  3610. Contravariant metric components
  3611. E=mc^2 and kinetic energy
  3612. non minimal coupling
  3613. Deriving the speed of light from the Pythagorean Theorem
  3614. Equations of motion por a free particle in curved spacetime
  3615. special theory of relativity
  3616. Gravitational waves by analogy with Maxwell's equations
  3617. Energy approximation for small velocity
  3618. Relativity and the Heisenberg Ontology
  3619. Q: if you travel closer to c, will you see length(distance) contraction
  3620. if telescopes travels at 0.9999...c, we can seen things on andromeda almost realtime?
  3621. Andromeda paradox is flawed!
  3622. c^2 in Lorentz transformations and special relativity.
  3623. Conservation of angular momentum in GR
  3624. Where can I find "Survey of gravitational radiation theory" F.A.E PIRANI
  3625. What If Lorentz Invariance Violation Were Detected?
  3626. Deriving time dilation?
  3627. Black Hole, Fact or Fiction
  3628. Do you have to travel away from the observer for time to slow down?
  3629. Thought Expirement, Tethered Spacecraft travelling near light speed
  3630. Big bang in Robertson - Walker space - time
  3631. relativity breakdown
  3632. Space-time geometry in the absence of matter
  3633. 5D Wormhole more efficient?
  3634. Constant acceleration approach? =/
  3635. how does blackhole event horizon grow?
  3636. Twin paradox and jumping time
  3637. Deflection angles of photons passing by black holes
  3638. How to measure speed of light?
  3639. Constancy of the speed of light.
  3640. The Shape of the Universe, and General Relativity
  3641. My paradox, dead or not according to different observers!!
  3642. Straight Line Case. My paradox. Sorry if I rewrite and start a new post.
  3643. Is (our) future already exists, according to relativity?
  3644. Densities
  3645. photon speed
  3646. Anyone here play Portal? Portal + Relativity question
  3647. Is Spacetime Curvature Real? - Take 2
  3648. terminology for Doppler shifts
  3649. Question about C and Relativity
  3650. That famous equation - a better understanding
  3651. Equations for length contraction
  3652. Space?
  3653. Derivitave of y=sin^-1(x)
  3654. How innaccruate is GR?
  3655. testability of torsion
  3656. reg tensor algebra
  3657. twin paradox
  3658. A thought experiment for surpassing the speed of light
  3659. Simultaneity of a human life
  3660. Help with special relativity (frames of reference)
  3661. Is Einsten saying
  3662. Photon gas as medium for electromagnetic propagation
  3663. (Supposedly) New theory of spacetime?
  3664. basing everything on speed of light
  3665. Electron falling in the Kerr metric
  3666. Beam entering a black hole ?
  3667. Photons and gravity ?
  3668. Weak equivalence principle and GR
  3669. Do photons experience "instant" lifetimes?
  3670. ambiguity in time dilation due to relative velocity
  3671. Why does the bend in space time not affect the gyroscope?
  3672. Relativity books
  3673. Can someone help me understand this paradox please
  3674. How to denote tetrad in Abstract Index Notation ?
  3675. Twin paradox
  3676. Local coordinates for non-uniformly accelerated observer
  3677. Adding two velocities
  3678. Surprising CADO result ...
  3679. Does frequency of light increase if
  3680. Time and space are related?
  3681. signature scheme by pythagoras theorem
  3682. Bell's spaceship clarification
  3683. MTW exercises discussion
  3684. Does anyone ever do Newtonian physics with arbitrary time coordinates?
  3685. Length Contraction and Time Dilation
  3686. Diagonalization of metric matrix in general relativity
  3687. Do all gravity waves have the same frequency?
  3688. Quick question to clear up some confusion on Riemann tensor and contraction
  3689. General Lorentzian Relativity
  3690. Topology of flat spacetime
  3691. Why does time dilation create a velocity barrier but not a density barrier?
  3692. self-interactions in "linearized" gravity
  3693. Stress tensor : tension VS Pressure
  3694. trace-reverse field in linearized GR
  3695. Lenght contraction of a charged wire and time dilation?
  3696. Spacetime interval
  3697. Question about the space-time fabric
  3698. Gravity Probe B press conf. 4 May (any surprises? comment?)
  3699. Am I interpreting Einstein correctly?
  3700. Wave vector in curved space-time.
  3701. Why GR is non-deterministic?
  3702. Acceleration vs De-acceleration
  3703. Metrics!
  3704. Axiomatic approach to GR
  3705. Graviton propagator
  3706. Four-vectors
  3707. QFT and FTL
  3708. Would the effect of photon/quantum wrapping space time be negligible?
  3709. The Metric
  3710. Will GR ever explain the flyby anomaly?
  3711. Relativity Thought Experiment
  3712. Relative Speed and size
  3713. Geodesic motion from the EFE
  3714. Calculation of Speed
  3715. Proper Time
  3716. Determinism, Stokes' Theorem and Relativity
  3717. Can you determine absolute motion?
  3718. How can photon have frequency if its time is zero?
  3719. Are the definitions of vectors in Liner Algebra and physics contradictory?
  3720. What is the angular-momentum 4-vector?
  3721. Is increase in mass relative?
  3722. Confusion with proper time from different frame of references
  3723. On the two body problem in GR
  3724. Are acceleration and gravity completely equivalent?
  3725. Twin Paradox revisited
  3726. Principle of Equivalence Re-examined
  3727. Time and Space Relativity
  3728. Are the directions of charge flow (=current?) absolute?
  3729. addition of velocities
  3730. Gravity Paradox
  3731. Rope Paradox
  3732. Question about the Gravity Probe B Schiff equation
  3733. Velocity of Light, for an Accelerating Observer
  3734. Does the expanding universe contradict relativity?
  3735. Conservation Laws vs a Spinning 'Disk Brake'
  3736. Light emitting from an object moving near the speed of light.
  3737. Apparent Paradox?
  3738. time clock question
  3739. Wikipedia: using the four-velocity to understand time dilation (?)
  3740. Age of universe?
  3741. Mathematical Operations of General Relativity
  3742. Lorentz factor
  3743. Derivation of Newton's Third Law (?)
  3744. faster than light question
  3745. Relativity of Simultaneity: A question about the train paradox
  3746. Topology of Minkowski spacetime
  3747. spacetime bending
  3748. light momentum
  3749. Does a charge gain energy in every frame when it is accelerated?
  3750. Inertial reference frame
  3751. Time Dragging
  3752. Still faster than light?
  3753. inertial vs accelerating frame
  3754. question of age.
  3755. Manifestly covariant
  3756. Accelerating reference frames
  3757. basic calculation
  3758. Relativistic optics, w/ acceleration
  3759. Equation Needs
  3760. Is time and space moving through us? Do black holes rotation create time?
  3761. time measurement
  3762. stress-energy tensor in static cylindrical case
  3763. Questions on Stress-Energy tensor
  3764. Florida's streaming videos in GR.
  3765. Gravitational Pseudotensor Requirements
  3766. Speed of light
  3767. Twin Paradox
  3768. Gravity Acceleration through a Hole in Earth
  3769. Acceleration and mass
  3770. Help with equivalence principle please.
  3771. Divergence theorem/ Surface integral
  3772. Quadropole formalism
  3773. object at the speed of light
  3774. absolute parallelism in teleparallel gravity
  3775. Coordinate matters
  3776. Gravitational time dilation implies energy change?
  3777. Help Understanding Lorentz Factor
  3778. Electromagnetic Interference in Einestien Field Equation
  3779. how General theory irons out the paradox of newtonian physiaboucs about space travel?
  3780. The set of allowed trajectories in spacetime
  3781. Lorentz Transformation Applicability Re: EM & Casuality
  3782. notation for basis of tangent space of manifold
  3783. Question on the reasoning behind the light clock thought experiment.
  3784. Equivalence Principle: Are there any restrictions
  3785. interpretation of Einstein's E=mc2 paper
  3786. universality of Doppler shift for energy of any massless field
  3787. Covariant VS manifestly covariant
  3788. Conservation of rest mass
  3789. Albert Einstein's theory of gravity is generally explained in a wrong way
  3790. Can I express "stationary spacetime" and "static spacetime" in this way?
  3791. What are valid Preferred Frames?
  3792. Measurement Problem in Einstein's Relativity
  3793. Force? Curvature?
  3794. speed of light is constant because of doppler effect?
  3795. Black Hole thought experiment
  3796. Time Dilation - Is this a paradox?
  3797. What happens when you go near the speed of light and there's stuff in the way?
  3798. Stupid question
  3799. How does gravity travel through wormholes?
  3800. A or B series of time?
  3801. Complex metric solutions in GR
  3802. Energy of a point particle in curved space time
  3803. charge and the Equivalence Principle
  3804. How is Weyl Tensor associated with tidal force ?
  3805. Any Others?
  3806. gravitational waves
  3807. Does spaghettification occur around a super massive black hole?
  3808. I am a bit confused at "orthonormal tetrad" in General Relativity...
  3809. A derivation problem on Newman-Penrose Formalism and Dual Forms
  3810. Light-years, but for whom?
  3811. why is there gravity at a distance?
  3812. Whoosh - linear frame dragging papers?
  3813. Historical origin of energy momentum equation?
  3814. antimatter black hole
  3815. How to obtain the transformation of Null Tetrad ?
  3816. Canonical derivation of Landau-Lifshitz pseudotensor
  3817. arbitrary rescaling of rapidity; work-KE theorem in SR
  3818. Physical laws and tensor formulations of them
  3819. E=mc^2 proof. Why use Newtonian kinetic energy???
  3820. Did Lorentz or Einstein theoretically derive special relativity?
  3821. Silly question about (Galilei) transformations
  3822. Simultaneous Causation
  3823. Transformation confusion ?
  3824. Velocity of particle waves in an object?
  3825. Acceleration and quantum gravity
  3826. time
  3827. proper lorentz transformations
  3828. Schwarzschild radius question.
  3829. How can anything cross the event horizon of a BH?
  3830. How do you calculate the speed of a particle given its Total and Kinetic energy?
  3831. relativistic force
  3832. Time Sync Problems
  3833. Self similiarity
  3834. How do find out gravitational pull according to GR?
  3835. Question about the speed of light and relativity
  3836. Controlled experiment with time.
  3837. Derivation of Lorentz invariant
  3838. Why is the relativistic mass a rejected concept?
  3839. Is mass conserved by mathematical identity?
  3840. On "why massless particles move at the speed of light"
  3841. Levi-Civita and Jacobi
  3842. Tidal forces near a black hole
  3843. minimal coupling non minimal coupling
  3844. Does the shape of the Universe contribute to the gravitational path?
  3845. Why does gravity have to be non-linear?
  3846. energy stress tensor
  3847. Question about the Lorentz Transformation
  3848. Newton's Bucket Revisited?
  3849. twin paradox alone kills special relativity
  3850. Question about the bending of light
  3851. how to find flux through a black hole
  3852. Simultaneity & a Temporal GPS
  3853. Determining who measures Proper Time and Length
  3854. Special theory of relativity question
  3855. Difference Between Newton and Einstein
  3856. Speed of light question
  3857. Einstein and the Ether
  3858. Physical definition of inertial reference frames
  3859. Question relating to the Ehrenfest Paradox
  3860. Does gravity affect gravity?
  3861. Train experiment in special relativity: a problem?
  3862. Space time reversal inside a black hole
  3863. Removing extraneous factors in Einstein Action
  3864. Non inertial frame: Speed of light
  3865. General Lorentz Boost
  3866. Lorentz transformation Limit
  3867. How could "strange shapes" affect space-time?
  3868. Your photonic rocket reaches planet A, 10 light-years away in 10 years.
  3869. The Schwarzschild (Exterior) Solution
  3870. Approximate Space Physics for Online Game
  3871. question about speed of light
  3872. Einstein field equations
  3873. significance of gauge transformation...any experts?
  3874. Nested Lorentz contractions
  3875. Lorentz factor and Bondi factor
  3876. Einstein's Field equations & quaternions / octonions
  3877. General confusion with four velocity and four acceleration
  3878. Does size increase or decrease as mass approaches c?
  3879. Clocks and curivture
  3880. space matter
  3881. stress energy tensor for a swarm of particles ( in MTW )
  3882. Simultaneity question – is sequence absolute?
  3883. question about energy in C-O-M frame and Lab frame.
  3884. Light Clock Experiment - questions from a newbie?
  3885. variation of cosmological constant with time
  3886. Issues entering a spacetime in GRTensor II
  3887. Schwarzschild Metric - Need help understanding
  3888. Time dilation and twins paradox
  3889. Unique acceleration in gravitational fields
  3890. Confusion with lower/raising indices
  3891. Parallel velocity hydrogen/antihydrogen annihilation at relativistic speeds.
  3892. Can time dialation really just be the slowdown of physical processes?
  3893. No real purpose in space-time?
  3894. Black Holes and grvity
  3895. Age divergence of Identical accelerating twins
  3896. Curvature of space/time question/problem
  3897. Twin Paradox - relativity
  3898. Do tidal forces mean the Equivalence Principle is BS?
  3899. what is a graviton?
  3900. is the speed of light a paradox?
  3901. Correct Expression for the Weyl Tesnor
  3902. Speed of light - why is it a constant?
  3903. Magnetic field from Van De Graff
  3904. Blackhole mass = Hawking temperature x Entropy?
  3905. light bent in gravitational field..
  3906. Penrose-Terrell rotation and the 3 great special relativistic myths
  3907. What is Expanding Horizon of a black hole?
  3908. Matter to energy
  3909. Equivalence priciple, light bend
  3910. special relativity/speed of light
  3911. Does GR contradict Mach's principle?
  3912. Higgs field at the event horizon
  3913. Did David Hilbert beat Einstein to Relativity?
  3914. More Stuff
  3915. Lorentz transformed pressure for a rod with two masses at its ends
  3916. In General Relativity, what would happen to the Earth the Sun disappeared?
  3917. Rotation tensor and absolute time
  3918. Solid angle , never seen derivative !
  3919. A crazy thought
  3920. Mass energy equivalence
  3921. Gravitation radiation question
  3922. FRW symmetry
  3923. Not sure about this coordinate definition
  3924. Schwarzschild radius and curvature
  3925. Conservation Law in curved spacetime
  3926. Electric field in curved spacetime
  3927. Relativity Explained Via Movement, Not "Time"
  3928. What effect does the expanding universe have on spacetime?
  3929. Why (-,+,+,+) and not (+,+,+,+)?
  3930. Speed of light.
  3931. Inertial frame dependent on mass?
  3932. Pros and cons of Palatini Formalism?
  3933. Lorent's time transformation Feynman 15-6 simultaneity
  3934. Possible non-existence of black holes and consequences
  3935. Godel's metric in cylindrical coordinates
  3936. A virtual pole vaulter in the relativistic barn
  3937. Time-Dependent Lagrangians
  3938. time
  3939. Gravitational time dilation on cylinderical objects
  3940. gravitational field
  3941. Gravitons vs Attraction Due to Curvature of Spacetime
  3942. proportionality of time to motion
  3943. Light Bending: Comparison of Theories
  3944. Turnkey black hole scattering software?
  3945. calculational details of Hawking radiation
  3946. Electric field of charged black hole.
  3947. time dilation and death
  3948. Faster than light time travel
  3949. Mass distribution of a black hole?
  3950. Covariant and Contravariant Tensors
  3951. Gravity's Effect on Time
  3952. Schutz 4.5, p. 100: A differential equation
  3953. Are photons timeless?
  3954. Finkelstein's "unidirectional membrane" paper
  3955. Magnetism & relativity
  3956. GTR paradox
  3957. Permeability of space
  3958. Backround independence and the definition of distance
  3959. Lorentz Transformations in general
  3960. SR pedagogy: energy-momentum and area in the x-t plane
  3961. Lorentz ether frame, Relativistic Mass, and Inertia
  3962. Special Relativity and direction of travel
  3963. Energy change of a photon when it bounces between two mirrors
  3964. Length Contraction of the Universe Surpassing Length of Moving Object?
  3965. Would gravitational time dilation prevent Singularity in a black hole?
  3966. Please suggest some material for quick review of general relativity.
  3967. Effects of Gravity and velocity on Time
  3968. divergence of einstein tensor
  3969. Photon at rest
  3970. Curved Space-Time
  3971. Unified Field Theory
  3972. Event horizon radius
  3973. static circular twin paradox
  3974. Rope Going Off Hook Paradox
  3975. How Is The Relativity Of Simultaneity Consistent With Physics And Relativity
  3976. Time dilation plus constancy of light implies space is dilated?
  3977. Why we do not attribute the gravitation for force but for distortion of spacetime?
  3978. forces and reference frames
  3979. maximum attainable speed.
  3980. General Relativity math, Tangent vectors on manifolds
  3981. what is the difference between special and general theory ?
  3982. Simplest force
  3983. Conservation Law
  3984. what is mass
  3985. Questions about light speed, time, and dimensions.
  3986. Killing vectors in KS coordinates
  3987. PC cpu limitation ruining our movie promise
  3988. Fluid element, conceptual questions
  3989. If already known the Action and unkown the Metric, how to get geodesic equation?
  3990. The Cosmological (constant)
  3991. question about Black Holes (simple question)
  3992. What equations are affected by Lorentz Transformations
  3993. Symbolic manipulation program required
  3994. Force Law Transformations
  3995. Lorentz Contraction Physical Reality
  3996. The dimension of fields
  3997. Space-Time Dilemma
  3998. Length contraction
  3999. Hermitian Metric - Calculating Christoffel Symbols
  4000. Scenario where time dilation seems to be paradoxal
  4001. Falling into a super massive blackhold
  4002. What tests have been done to confirm the speed of gravity?
  4003. Gravitational behaviour of antimatter
  4004. Relative Mass Gravity
  4005. Space-time at the speed of light
  4006. Calculating the speed of the earth
  4007. question on Frame Dragging
  4008. Problems with a complex stress-energy tensor
  4009. Is body to body gravity scale independent?
  4010. The Speed of Light, Gravity, and Why it all is what it is.
  4011. Do photons exert gravity?
  4012. Where did the gravity come from?
  4013. maxwell's equations and relativity
  4014. Gravity - Force or Effect?
  4015. Rotation of coordinate system in minkowsky spacetime
  4016. If time slows down as velocity approaches C...
  4017. Do gravity waves exist?
  4018. Is the polarization of light relative?
  4019. 99% The Speed of Light!?!?
  4020. Self-Torques???
  4021. mass in special relativity
  4022. Non singular black hole solutions
  4023. Simultaneous Polynomials
  4024. Mechanism for Alcubierre engine?
  4025. Light - What exactly is happening?
  4026. Does Time Exist?
  4027. Basic questions on time dilation (probably already answered, sorry)
  4028. proton falling into a Black hole?
  4029. Relativistic effects on a body rotating at near c
  4030. Easy question on proper time
  4031. Raychaudhuri equetion
  4032. Relativistic problem...?
  4033. Help...
  4034. Lagrangian for black hole
  4035. Superluminal speed............
  4036. Why Does Redshift Occur?; Other Factors That Cause Elongation Of Wavelength?
  4037. How exactly does mass curve space?
  4038. Absolute speed of light
  4039. Black Hole Rotation Speed
  4040. Relativistic Ohms law
  4041. Nature of Gravity Discussion
  4042. Are black holes theoretical or real?
  4043. How can we test space-time for pseudo-Riemannian-ness?
  4044. Thought-Experiment with illustration - help me understand...
  4045. Einsteins General Relativity
  4046. Relativity and Probability Waves
  4047. Mercury's Precession
  4048. Interesting energy problem
  4049. why can light travel at the speed c?
  4050. Relativity stands
  4051. Cosmological Light
  4052. E=mc2 How did Einstein get to this equation?
  4053. Relativity question.
  4054. Radial tidal forces and tidal forces on moving objects redux
  4055. humans travelling at light speed?????
  4056. Variable speed of light
  4057. gravitational waves predicted by Einstein
  4058. So if space/time is a "plain"...
  4059. Kinetic Energy approximation both Einstein's and Newton's
  4060. Simple relativity problem. Help needed.
  4061. Lagrangian for the propagation of light in spacetime?
  4062. space time
  4063. Flywheels and gravity in GR
  4064. Lorentz covaraince of differntial operator
  4065. Alcubierre Drive vs the Hubble Constant
  4066. Lorentz transformation for non-inertial frame
  4067. What is Einstein Notation for Curl and Divergence?
  4068. defining the dimension of a singularity?
  4069. Black Hole matter
  4070. The fastest you can age?
  4071. Does causality principle still have meaning when space-time dissapear(before BigBang)
  4072. Does increasing velocity shrink matter?
  4073. Lagrangian for the General Relativity
  4074. Doppler Effect and Space-time
  4075. Global GR theorems without energy conditions?
  4076. Proof: Velocity of Light can't depend on velocity of body emitting the light
  4077. Firing a bullet from a gun in a gravity well.
  4078. A problem with time dilation help!?
  4079. 2 protons have less mass than combined
  4080. Closed timelike curves
  4081. Thought experiment on the nature of light
  4082. Penrose diagrams, reference request.
  4083. What is the Stress-Energy Tensor
  4084. Gravitational effects on particles orbit in a box
  4085. Can you create a black hole from light? Also, Whiteholes vs. Blackholes
  4086. Reaching C
  4087. The gauge of general Relativity
  4088. The Spaceship experiment: Questions on Light's Inertia and Measuring Distance
  4089. Moving Clocks Run Slow?
  4090. Geometric shape of Minkowski space
  4091. Black hole surface gravity question
  4092. first historical experiment disproving Ritz emission theory?
  4093. Sundial and Relativity
  4094. Can calculus find the momentum of light?
  4095. object size
  4096. Time and physicality of dimensions
  4097. Falling Light under gravity
  4098. Are angles relative?
  4099. Time dilation/ light speed-thought experiments
  4100. When is something covariant or contravariant?
  4101. Mass of potential energy
  4102. how is twin paradox resolved in case of no/zero acceleration?
  4103. Speed of light hypothetical question
  4104. Planetary Orbits calculated from the Metric
  4105. SR/GR FAQ requests
  4106. Spinning disk contraction
  4107. Fermi-Walker transport
  4108. Two expression for relativistic acceleration
  4109. Is this GR explanation legit?
  4110. Describing Time to a Philsopher
  4111. Lorentz Transformation on a Wave Function
  4112. Basis for time travel
  4113. Speed of Sound, Light, and... Time?
  4114. Is relativistic momentum conserved?
  4115. speed difference
  4116. Wrong Time Dilation
  4117. Why can't there be a center of relativistic mass?
  4118. Why is the Time component in the Space Time Interval negative????
  4119. Parallel transport of a vector.
  4120. Force on a massless classical particle
  4121. Instantaneous Communication Between 2 Stationary Observers
  4122. The difference between big delta and small delta?
  4123. parallel transport on sphere
  4124. Gravitational time dilation
  4125. Time dilation question.
  4126. rest mass and apparent mass
  4127. You have a solid bar that is
  4128. SR Photon target
  4129. plausibility arguments for noninteraction of parallel beams of light
  4130. Don't fully get Lorentz equations
  4131. Energy-momentum of non-free classical particle
  4132. can't make a clock out of light
  4133. A question about the relationship between light and time.
  4134. Own Grandfather
  4135. Local gravity calculation
  4136. empirical verification of conditions for Hawking singularity theorem when Λ≠0?
  4137. Question for the Dr. Who fans... (or anyone really)
  4138. action at a distance v curvative of space
  4139. Momentum of "massive" classical free field
  4140. Does Mach's Principle Work Both Ways?
  4141. Writing Sci-fiction Graphic Novel need advisement in "space travel"
  4142. Negative Metric Signature
  4143. de Broglie wavelength shift in gravitational fields
  4144. Is the speed of expansion of the universe faster than light?
  4145. A photon's time
  4146. Striving Speed of Light?
  4147. Mass of trapped photons vs. Mass of potential energy
  4148. Help with energy momentum relation.
  4149. Homothetic Vector Fields
  4150. entropy as a measure of time in relativity
  4151. Wormholes & Conservation of Energy
  4152. Origins of the idea of a tachyon? (and a greeting)
  4153. Wormhole
  4154. Connecting Two endpoints in space using a Wormhole.
  4155. Is it possible to post diagrams multiple times? (move if needed)
  4156. Equivalence classes
  4157. Alice and Bob on the Tracks
  4158. Question on Time Dilation Experiment
  4159. Gradient of a tensor in cylindrical coordinates
  4160. Mach's principle
  4161. Question about time dilation
  4162. charge in a black hole.
  4163. Elementary questions about connections.
  4164. Where is potential energy in relativistic formula of energy?
  4165. Questions on Relativity
  4166. Gravitational Time Dilation - Is my head older than my feet?
  4167. Question of acceleration
  4168. Speed of Gravity the Same in All Reference Frames?
  4169. External view of a black hole
  4170. Relativistic Momentum Remains a Vector When in the context of Relativistic Energy?
  4171. In <Cosmology> written by Weinberg, in page 109
  4172. Confusion about time dilation
  4173. Are there any similarities between GR tensorial
  4174. trying to understand spacetime curvature
  4175. postulate of SR re speed of light
  4176. worldline's arc-length
  4177. Laypersons problems understanding Black Holes
  4178. Help me reconcile this
  4179. Red/ blue shift do to gravity
  4180. covariant derivative
  4181. Length contraction
  4182. range of time
  4183. Need help resolving this paradox with time dilation
  4184. speed of light in non inertial frames
  4185. Why is the time dimension different from the 3 space dimensions
  4186. Question about time in Lorentz Tranformation
  4187. Relativity and light
  4188. How is the space distorted?
  4189. Are there 2 kinds of Time?
  4190. How can I access to the following reference?
  4191. Can Equivalence Principle Be Violated?
  4192. Time Dilation Concept Confusion
  4193. Escaping the Schwarzchild Radius
  4194. Is the speed of light constant
  4195. confusion regarding Time dilation please help?
  4196. Relativistic Currents
  4197. Does there being a speed limit imply that all observers view object at speed limit?
  4198. Our 'Background' Speed and How it Fits with Time Dilation
  4199. Frame dragging = CTC?
  4200. Wanting to understand the one-way speed of light problem in more detail please
  4201. Why does action have to be invariant?
  4202. Interchangeability of time and space
  4203. Is Center-of-Mass Supraliminal?
  4204. Conservation of energy in gravitational red shift
  4205. Issues with predicting Mercury's Orbit
  4206. Interaction between charges in motion
  4207. hydrogen atom to 90% the speed of light
  4208. GR and energy conservation
  4209. Question about Relativity of simultaneity and light clocks
  4210. Open and Closed Models in Cosmology
  4211. Re: Spacetime curvature
  4212. The General Relativity Metric and Flat Spacetime
  4213. Question on time measured
  4214. Torsion in GR and Einstein-Cartan theory
  4215. bacteria space travel !!
  4216. what if a black hole had a negative size ?
  4217. Inelastic collision problem/ unequal masses.
  4218. *May be a stupid question* Does Oxygen/Nitrogen bend space-time?
  4219. Who’s spin in the Einstein-Cartan theory? Source’s or test particle's?
  4220. Is there a phase space in GR?
  4221. Moving at c
  4222. twin paradox
  4223. CONCERN about relativity, need a quick answer!
  4224. covariant derivative of riemann tensor
  4225. Question from the FAQ on Rest Frame of a Photon
  4226. Transformation of the Line-Element
  4227. Composition of 2 Boosts in Special Relativity
  4228. mass-energy equivalence
  4229. Confusion
  4230. What is a "Space Structure" in relativity?
  4231. The Curvature of Space and Acceleration Confusion
  4232. question about equivalence principle
  4233. Lorentz transformations formulas
  4234. light speed barrier / closing speed
  4235. Rest Frames and Photons and c
  4236. accelerating to speed of light
  4237. the C is the speed of photon ( light ) ?
  4238. a problem in general relativity
  4239. The how's and why's of SR
  4240. Invariance of interval in SR
  4241. Length and Distance Contraction
  4242. If co-moving with a photon
  4243. Why is speed of light 299 792 458 m / s
  4244. magnetism to test for movement?
  4245. Newbie question -- Conceptualization of time dilation from matter's perspective
  4246. Cygnus X-1 is nearly extremal.
  4247. Inquiry about kinetic force in STR
  4248. Singularity and our reality
  4249. covariant derivative of stress-energy tensor
  4250. Logarithmic spiral photon orbits
  4251. Charged Particle and Gravity
  4252. advances in michelson morley interferometer
  4253. What does added mass mean for a spaceship travelling at the speed of light?
  4254. Negative time
  4255. what would the universe be like if c were not uniform
  4256. Quantum current density in general relativity
  4257. What is a Poincare group?
  4258. Problem in Special Relativity
  4259. Lateral momentum of light
  4260. Not Understanding Time Dilation.
  4261. Terrell Revisited: "The Invisibility of the Lorentz Contraction"
  4262. deriving GR from maximum power
  4263. Spinning Massive Sphere
  4264. Why is the light clock accurate?
  4265. Yet another one on the twin paradox/proper acceleration
  4266. Two balls in space
  4267. Lorentz Transformation Derivation
  4268. Help resolving absolute motion paradox please.
  4269. Possibly simplistic question about massive moving objects
  4270. Boost in General Relativity.
  4271. Relative motion and B fields.
  4272. Not Understanding Time Dilation - mk 2.
  4273. Completely General Lorentz Transformation
  4274. Bullet-hole "paradox"
  4275. Is time dilated if gravity is pulling equally in all diections?
  4276. Parallel Projection of 3-space unto a plane at c.
  4277. Backreaction of accelerated motion on spacetime curvature
  4278. More thoughts on the twin paradox. One persons view has to be an illusion?
  4279. Energy-momentum of gravitational waves
  4280. Basic questions - k calculus.
  4281. Planck constant is Lorentz invariant?
  4282. Help me to kill my paradox
  4283. Two different velocity variables in relativistic momentum?
  4284. Lorentz contraction in other dimensions?
  4285. "Michelson-Morley" experiment(s)
  4286. 5D Space,Higher Dimensions etc.
  4287. Sketched solution
  4288. Violation of causality
  4289. How does E=mc^2 ??
  4290. Help with Relativistic Collision
  4291. Relativistic Momentum Help With Equation Reduction
  4292. Gravitation and Space Time warps
  4293. Pushing a stick into the moon
  4294. Whether the speed of alternative/direct current is faster than light???
  4295. manipulating space time
  4296. Relativity Video Check
  4297. Derivation of Relativistic Momentum WITHOUT using Relativistic Mass???
  4298. Time travel by going fast in a spaceship: questions
  4299. Twin "Paradox" with no asymmetry
  4300. School me on gravity waves...
  4301. Concerning the importance of preffered time coordinates
  4302. Einstein's tensor divergence
  4303. Absolute force
  4304. Rocket-man measuring speed of light...
  4305. Einstein's Train and Lightning Bolt Simultaneity Situation
  4306. Tensor transforming law problem / metric-delta contraction
  4307. lorentz factor
  4308. Wormholes - A way to violate energy conservation?
  4309. Camera near the speed of light
  4310. relative velocity
  4311. Question about GR
  4312. Relativistic Momentum Derivation Help
  4313. Covariant and Contravariant Kronecker Delta operating on Tensor
  4314. I forgot what this is called and what is is written out.
  4315. Question about static spacetime
  4316. difficulty in learning tensors
  4317. Deriving the Schwarzschild Metric
  4318. When the Schwarzschild radius is inside the star
  4319. Fundamental question on GR: Basis vector meaning
  4320. Deriving EFE from the Bianchi Identities
  4321. How do I calculate time dilation due to acceleration in SR please?
  4322. Large rotating disk.
  4323. Belt Paradox?
  4324. still learning about tensors ...
  4325. Mass to energy conversion at fraction of speed of light
  4326. General Relativity at the microscopic level
  4327. Speed of muon
  4328. Definition of Space
  4329. Starting GR
  4330. Vaidya/Lemaitre-Tolman metrics
  4331. Superposing two metrics
  4332. The shape of space-time around a star
  4333. Time-like Intervals and Causality
  4334. Einstein simultaneity train thought
  4335. Energy Density from Metric
  4336. Time traveling Light?
  4337. Cuurent statuses of theories of gravity
  4338. causes that led to discovery of GR
  4339. Einstein gauss bonnet gravity
  4340. Time dilation, mirror question
  4341. A Machine...
  4342. what means tha GB is a total derivative??
  4343. Question about simple linear accelerator
  4344. space, time and events
  4345. temperature within the epicenter of a Black hole.
  4346. Does a gravitating body have to undergo gravitational collapse?
  4347. Geometry and long space travel
  4348. Newbie question: Long trips and observed time
  4349. Newb question
  4350. Black holes in tetrad formalism
  4351. Effect of Gravity get bent like light around another gravitational source
  4352. Static gravity as a two form
  4353. Thomas Precession
  4354. Does GR remain in a universe without matter?
  4355. how do black holes merge when the singularity infinite density slows time to no time
  4356. Really confused - basic special relativity
  4357. Some exercises on relativistic doppler shift?
  4358. Rotational Killling vectors
  4359. Why don't gravitational waves get distorted?
  4360. Is the current black hole horizon observable?
  4361. Definition of local inertial frame
  4362. Gravity: why, how and ehhh?
  4363. TIME DILATION. WHY do clocks that are
  4364. A Bus travelling at a very high speed.
  4365. Electron spin after travel in gravitational field
  4366. total gravity of all mass and energy in Universe.
  4367. Simultaneity and Spacelike Interval!
  4368. Time Dilation Problem!
  4369. question about approaching light speed of a rotating object
  4370. General Relativity vs Geometrodynamics
  4371. The three vectors in the Null Geodesic equation
  4372. Covariant global constants of motion in GR?
  4373. high velocity
  4374. Precession of the LRL Vector in SR
  4375. Twin Paradox Question
  4376. relativistic energy
  4377. Gravity Probe B / precession question
  4378. Doubt about relativity!!
  4379. inner product in schwarzchild metric
  4380. Does simulataneity contradicts the constancy of speed of light
  4381. Old experiments with superluminal speed
  4382. Question regarding photons and mass
  4383. lenght contraction
  4384. How far does space-time bend out in space?
  4385. Question about the rotating disk
  4386. Why time is relative.
  4387. black hole
  4388. c
  4389. what is the path of earth in 4-d space??
  4390. Einstein equation's RHS sign
  4391. comprehensive list of cosmological models and their properties?
  4392. Progress on detection of gravitational waves?
  4393. Faster than light and time travel
  4394. light speed
  4395. Does expanding space affect time dilation etc?
  4396. accelerating spaceship paradox
  4397. Gravitational waves
  4398. Spacetime curvature and the force pulling an object "down" the curvature
  4399. Why can we use metric tensors to lower index of Christoffel symbol
  4400. Worldline congruence and general covariance
  4401. Hafele and Keating, local gravity field as preferred frame?
  4402. Gravitational redshift, energy and the EP
  4403. lovelock gravity
  4404. How it begins?
  4405. free fall and gravity
  4406. Susskind Lecture - accelerate reference frames
  4407. Speed of light for different observers
  4408. Time Dilation Question
  4409. Lijun Wang faster than light expierament
  4410. Relative Mass vs Gravity
  4411. Slightly confused about embedding picture and imagining spacetime
  4412. Question on Michelson Morley experiment and length contraction
  4413. Two identical black holes, but rotating in opposite directions collide
  4414. Clarification on mass-energy tensor and 4-velocity.
  4415. How emission theory was disproved by de sitter binary star experiment?
  4416. Visualizing Minkowski geometry
  4417. Divide in space and time component
  4418. Question on submanifolds of a semi-riemannian manifold
  4419. One Way Speed Of Light
  4420. Regarding constancy of speed of light
  4421. Relations between kinetic energy, momentum and velocity
  4422. Independent components of the curvature tenso
  4423. Using cadabra to calculate antisymmetric tensor field
  4424. 4-D Location of Observers
  4425. Phase Velocity
  4426. Spaceship Chase Scene
  4427. Einstein's mirror
  4428. Is curved space allowed to show discontinuities (steps)?
  4429. Fun with magnets, mass and folded space matrix.
  4430. Geodesic expansion in Mathematica
  4431. Black hole falling time for external observer
  4432. Twin paradox, new version
  4433. What does it means to say two events are simultaneously observed?
  4434. What exactly is compressed at very fast speeds?
  4435. BH fall time = pi*m. What is external time?
  4436. time/electromagntec spectrum and causality
  4437. Relativistic Mass vs. Invariant Mass.
  4438. General Relativity Gravitation Calculations
  4439. Contraction of the Riemann Tensor with the Weak Field Metric
  4440. journal of cosmology and gravitation
  4441. about confusion of lenght contraction, and possiblity of length expansion...
  4442. Time travel
  4443. Length contraction and the expansion of the universe.
  4444. Self-learning special relativity
  4445. Mass of a moving object.
  4446. Relativistic mass of falling body
  4447. Quick tensor question
  4448. Resultant Gamma after Einstein velocity addition
  4449. I'm wondering why the value that converts mass to energy happens to be lightspeed
  4450. MTW 25.29 v.s. 25.38 (first formula)
  4451. Is Gravity a force or the chape of spacetime?
  4452. Notation Convention: Primes in Coordinate Transformations
  4453. CERN team claims measurement of neutrino speed >c
  4454. Eotvos and Dicke experiment
  4455. Effect of gravity on time dilation.
  4456. Background required for general relativity
  4457. Relativistic momentum
  4458. Why does time slow down as you approach C?
  4459. Combining time dilation and length contraction
  4460. what can the rest frame of a neutrino possibly mean?
  4461. Does an accelerated particle emit gravitational waves?
  4462. I am sitting on my chair, am I accelerating for General Relativity?
  4463. Faster than light and time travel into the past.
  4464. If CERN's claim is true, how would SR and GR change?
  4465. derivative of a function of a lorentz scalar
  4466. Project ideas for modern physics class
  4467. Time with no gravitational force
  4468. Variation of the auxiliary worldsheet metric
  4469. Are laws of nature really the same in all reference frames?
  4470. Minkowski diagram - the angle between axes
  4471. Speed of light puzzle
  4472. flash of light thought experiment, need explanation
  4473. if a neutrino has a non-zero mass...
  4474. Just a quick question on the derivation of energy
  4475. OPERA neutrino arrivals analysis
  4476. Time dilation and length contraction in hyperbolically-curved spacetime
  4477. Is time reversal logically consistent?
  4478. If two spaceships are moving toward each other at the 0,9c
  4479. Acceleration measured in another inertial frame?
  4480. SR/LET Thought Experiment Help - Three clocks problem
  4481. How do Maxwell's equations indicate that the speed of light is constant?
  4482. Quick question about lorentz transforms
  4483. Basic derivation of Lorentz Transformation
  4484. What is the bare Minimum Lagrangian\Hamiltonian mechanics
  4485. speed of light last value accepted 1983
  4486. Simultaneity
  4487. relative increase in fuel mass
  4488. question about Hawking radiation in BH
  4489. Is Special theory of relativity only about speed of light?
  4490. Einstein's Length Contraction... A problem?!
  4491. Life "c" and the pursuit of an accurate distance measurement
  4492. Inertia - Why?
  4493. Towards a Generic Integral for Tau in Schwarzschild Radial Motion
  4494. Black hole light pulses
  4495. Value of energy-momentum tensor in weak field approximations
  4496. How did Einstein get to the fact that mass slows time?
  4497. Michelson-Morley experiment
  4498. How does Ricci curvature represent "volume deficit"?
  4499. Speed of light and time travel
  4500. Why do some think faster than c= time travel?
  4501. E=MC^2 question about the "M"
  4502. Question about time
  4503. What faster than light have to do with cause and effect paradox ?
  4504. Disapproval of relativity?
  4505. Time-like intervals
  4506. Time Dilation Earth orbit
  4507. Testing a Relativity Simulator
  4508. Gravity affecting gravity?
  4509. 2 Events, Velocity Creates Simultaneity
  4510. In what way do we still not understand gravity?
  4511. non-linear length contraction
  4512. Confusion with Lorentz boost
  4513. Rigid body movement
  4514. do photons have mass?
  4515. Theory of relativity challenged
  4516. Light Clock Example this is not HW
  4517. Ok can some one explain me what it mean that laser spot can move faster the light.
  4518. One more (possibly dumb) question.
  4519. Thoughts on electrically charged black holes...
  4520. Is gravity a gauge theory?
  4521. What relativity really looks like
  4522. What do I see wrong here ? T2 = T1 . (1 - V/C)
  4523. Is EVERYTHING affected by gravity?
  4524. Value of a measuring rod in an expanding universe?
  4525. Covariant Derivative
  4526. is gravity fictitious
  4527. two lightnings that happen at the same time, a train and a passanger
  4528. Is there a smallest unit of gravity?
  4529. Besides Diff Geom and PDE, what are the most relevant math courses to Gen Relativity?
  4530. Why do mass, time and length change at a rate determined by Gamma?
  4531. Is Lorentz factor reality true according to the laws of physics??
  4532. Relatively massive object moving at relativistic velocity passes close to the earth,
  4533. Special Relativity breaks down in matter???
  4534. 2 objects travailing in opposite directions?
  4535. What is time?
  4536. What are the effects of Gravitomagnetism?
  4537. Relative motion - disagreement at very low speeds
  4538. Why does time depend on light?
  4539. a mind experiment about speed and time
  4540. e=mc^2
  4541. c=1 meaning
  4542. Did I understand this correctly - time slowes down due to acceleration?
  4543. Why does length contraction happen only in the direction of motion?
  4544. Spacetime expanding within galaxies?
  4545. Conservation of Momentum puzzle
  4546. Constant Curvature
  4547. Aging and time dilation
  4548. The crossing of two light waves, a point standing still ?
  4549. Relativity and elementary physics
  4550. Comparative speed of moving vs unmoving
  4551. Special Relativity basic concepts confusion
  4552. Conservation of four momentum
  4553. diffeomorphisms to poincare
  4554. Is this valid?
  4555. Time dilation in a non-inertial reference frame
  4556. Red/blue shift in classic train/platfom thought experiment?
  4557. Why is light speed constant in all reference frames?
  4558. Gravitational Acceleration
  4559. How can a metric connection have torsion?
  4560. A Photons relativistic mass
  4561. simultaneity is directional while time dilation is not?
  4562. Schwarzschild Metric - Rindler coordinates
  4563. Someone moving near c to an observer?
  4564. Do the GEM equations embody the equivalence principle?
  4565. Doubts of a 13 years old boy about simultaneity, time dilation, spacetime behavior...
  4566. Radius of Ring Singularity in Kerr Black Hole
  4567. GR analog to F=ma
  4568. Spherical Mass Shell - What Actually Happens?
  4569. Absolute Space and Moving Co-ordinates.
  4570. Oppenheimer Snyder Collapse - finite time?
  4571. Divergence of Energy-momentum Tensor
  4572. My understanding of Space, Time and "spacetime"
  4573. Length Contraction
  4574. The relationship between light, energy and relativity
  4575. Vacuum and non-vacuum regions, dust and fluids
  4576. Einstein's field equations
  4577. Need quick answer on spatial dimensions
  4578. Momentum at the speed of light
  4579. A thought experiment with theory of relativity.
  4580. Earth's orbit and relative speed/time
  4581. M.Sc Project topic sugestion
  4582. How does GR handle metric transition for a spherical mass shell?
  4583. in the back of the popular Relativity book..
  4584. local inertial frames
  4585. gravitational degrees of freedom
  4586. The theory of Cosmological Relativity by Dr. Moshe Carmeli.
  4587. Abraham's light momentum breaks special relativity?
  4588. Global observations from Rindler frame
  4589. Q: A&B moving in opposite directions @ 0.6 c comparison with sound.
  4590. Derivation of expansion scalar for FRW spacetime -- weird observation
  4591. Time dilation thought experiment clarification
  4592. Mass is Energy Moving Faster then Light?
  4593. beginner question about special relativity
  4594. time-space in a photon?
  4595. How would one answer a question Combining SR and the Broglie Wavelength equations?
  4596. Equations or reality....
  4597. E=mc^2
  4598. What is it that sets the speed limit of light?
  4599. Center of mass of a system of two photons
  4600. Help understanding a SR equation!
  4601. What do I do with these christoffel symbols?!
  4602. time/speed relation on earth
  4603. lorentzian metrics w/ timelike closed curves on cylinder that is a 2-manifold
  4604. Confusion over Einstien summation convention and metric tensors.
  4605. Speed of Light and Relativity of simultaneity!
  4606. Distance light travels in a relatively moving frame?
  4607. energy of photon never becomes zero
  4608. How did Einstein Define Time
  4609. If energy/matter deforms spacetime in three dimensions....
  4610. Can the change in energy change the mass?
  4611. spacetime elasticity
  4612. Alternative way to calculate the special relativistic time dilation factor
  4613. Gravity's effects
  4614. Michelson-Morley experiment, a pointless exercise when taking SR into account...?
  4615. Conservation of momentum question
  4616. Is it possible to communicate through an Einstein-Rosen bridge without violating caus
  4617. Newton's 3rd Law
  4618. A Stupid question
  4619. GPS and relativity
  4620. A few questions about Relativity, Light, and Physics that dont seem to make any sense
  4621. time dilation and relative velocity
  4622. I have a crude understanding of dark energy and the relativist universe.
  4623. Cosmological constant - attractive/repulsive character
  4624. Please Explain this problem
  4625. Questions about photons. Their interaction with time and their life-cycle.
  4626. boosting four-acceleration
  4627. potential energy contributes more to gravity
  4628. Real life examples of simultaneity
  4629. Quick Time Dilation Question
  4630. Fourier transform in Minkowski space
  4631. Can Neutrinos Travel Faster thyan Light?
  4632. Symmetry assumption in derivation of SR
  4633. Lorentz Transformations and Photon Delay
  4634. Trace of SEM tensor
  4635. Two electrons and... a paradox?
  4636. The Lorentz Transformations and a Few Concerns
  4637. Speed of Lightning
  4638. Thought Experiment
  4639. Detecting if you are moving ?
  4640. What is the relativistic cause of planetary orbital rotation.
  4641. Canal ray Doppler shifts
  4642. e=mc2
  4643. A question regarding Special Relativity.
  4644. acceleration vs timetravel
  4645. replication
  4646. Mass-less particles? How can that be?
  4647. Why doesn't light get absorbed?
  4648. The physics of black holes
  4649. Could GPS satellites be used to detect gravitational waves?
  4650. Incompleteness
  4651. action and lagrangian for massive particles moving in gravitational field
  4652. Perturbative Construction of General Relativity
  4653. Twin paradox: who decided who is the younger one
  4654. Metric component confusion
  4655. What is the need for KK-theories (and similar)
  4656. accelerated observors in flat space
  4657. Speed of light measurements using different light source.
  4658. Which principle would be violated?
  4659. the idea of anything crossing the event horizon of a black hole from any observer's v
  4660. I don't understnad how to get the 4-volume element for a Minkowksi space..
  4661. Einstein Field equations for dummies
  4662. Spinning Mass & Spatial distortion
  4663. Spinning mass & spatial distortion
  4664. How does SR apply to rotating bodies?
  4665. Time Dilation and Length Contraction near the Event Horizon of a BH
  4666. On the Reissner-Nordstrom Metric
  4667. Time Dilation
  4668. Family of nested spheres in Schwarzschild spacetime
  4669. questioning speed of light and infinite mass
  4670. Dirac delta function transformation property
  4671. Geometric representation of two-forms.
  4672. Is this a legitimate derivation of the changing of mass?
  4673. problem Landau relativity special
  4674. Gravity re Newton & Einstein
  4675. Coordinate change to remove asymptotic geodesic?
  4676. Do Einstein's Field Equations Show Up Anywhere Else?
  4677. Question about viewpoints in relativity
  4678. Inertial frame of reference of light speed (And beyond)
  4679. Is there really an absolute reference frame??
  4680. gamma5 x d^2 Lorentz invariant?
  4681. What energy term determines gravity in GR?
  4682. Momentarily Comoving Reference Frame
  4683. Reflecting light seen by two moving persons, explanation already known?
  4684. Thought Experiment on the speed of light
  4685. Finding Equations of Motion from the Stress Energy Tensor
  4686. What does it mean to move through time?
  4687. "Breaking Light"
  4688. cosmologist observation the speed of light is not a constant depending on region...
  4689. Change without time
  4690. Wgat would a "light clock" measure in free fall?
  4691. A case of what distance
  4692. Time dilation
  4693. Problem with tensors
  4694. How to explain time dilation easily to others, maybe like this ... ?
  4695. mass increase
  4696. space time curvature caused by fast electron
  4697. Curved-spacetime, but why curved coordinates?
  4698. Question about FTL travel vs. FTL acceleration
  4699. visual effects of SR versus GR
  4700. Needing a basic clarification with SR
  4701. Tensors, getting to know them
  4702. Time dilations: How do we actually see things?
  4703. Can special relativity result in alternative realities?
  4704. Is my intuition correct?
  4705. Varying Gravitational Field - Invariant Tetrahedron??
  4706. Michelson-Morley experiment doubts
  4707. Why are photons massless?
  4708. is this statment true ?
  4709. Downloading e-books makes Kindle heavier??
  4710. Table of Connection Coefficients
  4711. Could time as a dimension have property that would behave like energy ?
  4712. formula of doppler effect for sound,relativistic?
  4713. Good resources for integrals in Four-Space?
  4714. Is SR and GR Time Dilation the same thing?
  4715. Special relativity under the inflation of spacetime
  4716. why can we explain gravity geometrically but not EM force?
  4717. cosmological horizon still is at the big bang
  4718. Relation between affine parameters
  4719. A kind of Tensor notation?
  4720. speed of light and time dilation
  4721. Is general relativity generally covariant?
  4722. Einstein's original 'thought experiment'
  4723. The unit vector normal to the curvature of spacetime
  4724. A spinning singularity?
  4725. Elegant Universe: Example of motion's effect on space
  4726. Pondering basis vectors and one forms
  4727. Question about Brian Greene's wormhole illustration in "Fabirc of the Cosmos"
  4728. The zeroth component of the four-momentum
  4729. Gravity
  4730. Solutions to the space-time metric
  4731. Objects colliding at c
  4732. speed limit
  4733. Lorentz invariants
  4734. Silly doubt on relativity
  4735. Speed of gravity modification
  4736. Impossible scenario?!?
  4737. First integral of Lagrangian
  4738. Deriving time dialation?
  4739. Going back in space vs Going back in time
  4740. Reaching the Rindler horizon in a finite proper time
  4741. Gravitational Time Dilation and Contradicting Physical Events
  4742. energy degradation of light
  4743. time dilatation and 'now slices'
  4744. No Such Thing as the Plank Length?
  4745. relativistic doppler effect - inconsistency in my derivations
  4746. Rest frame relative to CMB
  4747. Symmetry in special relativity
  4748. A query regarding Ether wind
  4749. Is SOL infinite? (from its own point of view)
  4750. Triplet paradox: where's the error in my logic?
  4751. Illusion of Time: Is the Future Already Written?
  4752. Relative mass and velocity
  4753. Different values for the inertia of a moving object?
  4754. Absoluteness of acceleration
  4755. Acceleration thought experiment
  4756. Different "Slices of Now" Observable from Earth?
  4757. Twin Paradox Explanation Needed
  4758. Why so many definitions of an inertial frame?
  4759. Black holes and time dilation around the event horizon
  4760. What is a lapse function
  4761. Twin Paradox Explained
  4762. Why Is General Relativity Hard to Work With?
  4763. Time Dilation - Relative to Light Speed or Reference Point - I'm Confused?
  4764. Newtonian frame of refference
  4765. length contraction and accelerating frames
  4766. Time Loop Examples
  4767. scientific measurement standards
  4768. How do black holes move?
  4769. Connection between gravity time dilation and velocity.
  4770. Mathematical Basis for Learning Relativity
  4771. Visualizing a 4D structure
  4772. How far away is it?
  4773. The "Illusion of Time" and distant observers
  4774. You approach a planet at a velocity near c, what do you see?
  4775. Timetraveller killing himself in the past
  4776. Redshift and Weak equivalence principle
  4777. gravity is different
  4778. The speed of light and the mass of a photon
  4779. What if speed limit is slightly faster than light?
  4780. Noob question about lorentz factor
  4781. What are the differences between an object with mass 0 and mass > 0 ?
  4782. Some questions about time dilation .. (muon etc.) ..
  4783. Big Bang Time Dilation
  4784. What is the observed precession of Mercury?
  4785. FTL implies Backward Time Effect
  4786. What is causality???
  4787. Block Time vs Q. Indeterminacy
  4788. Does time stop for a photon? Why is that a nonsensical question?
  4789. Wald's definition of the Cauchy Horizon
  4790. c maximized in its own direction, so v > c possible ?
  4791. Questions about the speed of light
  4792. 2nd order correction to gauge transformation
  4793. Why cant an object travel faster than the speed of light?
  4794. EP and active/passive mass
  4795. Usefulness of Kretschmann scalar
  4796. if light hits a mirror and then switches direction....
  4797. Can a human travel to distant stars? And other questions.
  4798. About dark matter and the limits of the universe.
  4799. What is the effect of a neutron star's gravity on vertical rays of light?
  4800. A simple question about tensor notation
  4801. List of different relative speeds?
  4802. Objects move into gravity=shorter time?
  4803. I would like to see the math of something
  4804. Assassin paradox
  4805. Calculate Accuracy of GPS?
  4806. How did light speed become the governor of relativity?
  4807. The principle of inertia and hypothetical FTL particles
  4808. Shooting up a rocket
  4809. More sliding clock fun
  4810. Inextendible worldlines
  4811. Relativistic mass increase appearing to form a black hole vs. a real black hole
  4812. Twin paradox question
  4813. QED and Very Slow Light
  4814. Mirror Puzzle
  4815. Shape of Earth
  4816. Gravity is space shrinking
  4817. Lorentz Transformations Acceleration: A simple problem
  4818. Question of units of B, H in Gaussian system
  4819. Metric of two bodies
  4820. Twins Paradox: The paradox within the paradox
  4821. Curious about time dilation?
  4822. Infinite mass and energy.
  4823. Spacetime desynchronized in quantum realm?
  4824. Diagonal metric
  4825. Question about how Time varies with Velocity
  4826. Passing the event horizon
  4827. Mass increasing as velocity approaches c
  4828. I don't understand photon clocks
  4829. Quick tetrad/vierbein question
  4830. Gravitational red shift
  4831. Negative Mass repels Gravity?
  4832. What experiment shows that the universal speed limit is the same as light?
  4833. Simple question about time dilation in accelerated reference frames
  4834. Questions about SR
  4835. how are the ways in which time is dialted unified?
  4836. Looking in to the past
  4837. Do Racing Drivers Age Slower?
  4838. Forces as Chrsitoffel symbols
  4839. Very basic question- help?!
  4840. Another basic question
  4841. Meaning of lambda symbol?
  4842. twin paradox... doubt
  4843. Michelson & morley experiment...........
  4844. Perceived time and distance at Speed of light
  4845. SR, LET, FTL & Causality Violation
  4846. A Relativity Experiment I'd Like to See
  4847. Faster than Light Travel Question
  4848. If a absolute point would exist, still relativity theory would be valid
  4849. Question on Black Hole Metrics
  4850. Travel faster than speed of light. According to what reference frame?
  4851. Speed of light between a source and target moving wrt to each other
  4852. changes in mass and length at high speed
  4853. wikipedia quote on gravitational time dilation
  4854. Is time slowing down or is it just taking a longer amount time?
  4855. Poincare' group
  4856. Does relativity have any day to day life applications?
  4857. Acceleration/deceleration questions
  4858. New animated video explaining Special and General Relativity.
  4859. Question about curved space.
  4860. is spacetime really bending?
  4861. Why light is remains massless even if travelling w/ the fastest velocity?
  4862. Effects of General Relativity
  4863. What is the velocity of a photon?
  4864. Four-Momentum Invariant and Conservation Laws Yielding Contradictory Results
  4865. You may see a light wave as relative time, without Lorenz time dilation calculated
  4866. how to find that the universe is expanding from general theory of relativity
  4867. How fast can light change its direction?
  4868. time for object to fall length of 10m rope, assuming g=10m/s
  4869. Speed of Light
  4870. How would Earth's time slow down?
  4871. The set of Lorentz boosts and space rotations form a group
  4872. Painleve chart for FRW spacetime
  4873. how does gravitational time dilation increase the spacetime interval?
  4874. SR, Inertial frames, Movement, Testing
  4875. Initial conditions for BH in GR
  4876. What is an invarient observable in GR
  4877. Is there mass without momentum?
  4878. Please explain these Equations in GR, Modified Universal law of Gravity.
  4879. Relativistic electromagnetism
  4880. Age and time ...
  4881. Death to mass or to force?
  4882. Minimum safe distance to black hole
  4883. infinite speeds would defeat time keeping
  4884. time dilation
  4885. The effect of external masses on internal black hole geometry
  4886. Where Can I find GR problems?
  4887. Matter Lagrangian for perfect fluid
  4888. What is time? Simply & Factually
  4889. If an electron falls into a black hole?
  4890. The relativity of time and defining the "age" of the universe
  4891. Time Dilation at Center of a Neutron Star
  4892. Four Momentum of Photon
  4893. How speed changes time?
  4894. The nature of causality in special relativity (not faster than light travel)
  4895. What is the result of this laser/time dilation scenario?
  4896. How do I go about learning GR?
  4897. Solving the Geodesic equations for a space
  4898. What does x-vt mean?
  4899. How is the Riemann tensor proportinial to the curvature scalar?
  4900. Warping of space and special relativity?
  4901. Why does time slow down the faster you go?
  4902. analogy between centrifugal force and gravity
  4903. Does General Relativity actually explain gravity?
  4904. What if something went faster than light?
  4905. Relativity, ultimate rigidity and the speed of light.
  4906. Does mass really increase with speed
  4907. General form of a Lorentz transformation
  4908. Time dilation derivation
  4909. Speed of Light
  4910. Photon interaction with gravity.
  4911. Gauge transformation
  4912. At what speed would one day = one year?
  4913. Is there evidence for increased particle life due to gravitational time dillation?
  4914. The past set of a stationary observer in Kerr space-time
  4915. we can travel faster that light?
  4916. E=mc^2, but nothing can travel faster than light?
  4917. Photons from the past
  4918. Questions regarding relativistic momentum
  4919. Special relativity implies very odd results
  4920. Difference between Newton & GR
  4921. Energy in two different frames
  4922. Observing the physics of Black Hole interiors‏
  4923. Spacetime, physical or not really?
  4924. Why extremal aging, not just maximal? (for an inertial body in spacetime)
  4925. Why nothing about acceleration?
  4926. Confusing twin paradox
  4927. Higgs boson and gravity
  4928. Foliation of time in quantum gravity
  4929. Non-Tensors in GR
  4930. Gravitational Redshift really verification of GR?
  4931. Discussion of Inertial Frames of Reference
  4932. light speed and time travel
  4933. Higgs free space travelling, close to lightspeed possible ?
  4934. Galilean transformation - can you show me an example?
  4935. Quick question about curvation of spacetime
  4936. Is the Milky Way galactic blackhole slowly sucking us in?
  4937. Large black holes and information
  4938. Another two ships relativity question
  4939. Physical meaning of tensor contraction
  4940. Einstein's Mirrors Experiment
  4941. Radial expansion of the universe and the speed of light
  4942. Observation from Single reference frame and STR
  4943. Velocity of a photon from its own reference frame
  4944. Speed of two spaceships relative to each other observed by an earth observer
  4945. Higgs & Relativistic
  4946. Spacetime Fabric Shear Strength
  4947. Special Relativity: The Game!
  4948. Why is this idea on addition of velocities in SR wrong?
  4949. Mathematical Axioms of General Relativity
  4950. Do we not even exist in some FoR?
  4951. time stasis chamber
  4952. Does a photon "know" how fast to leave its emitter?
  4953. Speed of light = oo mass = black hole?
  4954. Rotating black holes, causality and time travel ramble
  4955. What on ether is the matter?
  4956. Calculation of an integral with retarded time
  4957. Temperature in different frames
  4958. BB theory and preferred frames
  4959. Einstein's Mirrors Experiment
  4960. Behaviour of a box of light
  4961. Acceleration through PD, relativistic momentum
  4962. Recommend GR Texts
  4963. Meaning of Spacetime Foliations
  4964. Do things move in uniform motion in real life?
  4965. Lorentzian contraction of a box increases the pressure inside???
  4966. Gravitational potential energy storage location
  4967. A Case for the 4-D Space-Space Block Universe
  4968. How can you drive the metric of kaluza klein in 5 D?
  4969. light speed question
  4970. what comprises a SRT relative velocity?
  4971. Confused about time dilation. (Just got introduced to relativity))
  4972. Twin paradox question
  4973. Why are the effects of Time Dilation permanent but Length Contraction is Not?
  4974. Understanding proper distance in Schwarzschild solution.
  4975. Questions about Alcubierre Drive
  4976. Are gravitational effects instantaneous?
  4977. thought experiment for general rel., I can't remember how it goes
  4978. Question on light reflection
  4979. Very confused about path of light from distant galaxies :-(
  4980. Kaluza-Klein Particle
  4981. inverse coefficients of dt & dr in Schwarzschild
  4982. Stupid question on black holes and thermodynamics
  4983. Sean Caroll GR textbook Ex 2.11
  4984. A question about stationary reference frame
  4985. What is the length
  4986. Densest Material
  4987. Relative Motion Leads To Impossibilities (or so it seems to me... can you help?)
  4988. aberration of light in classical and relatvistical cases
  4989. Exceed speed of light: always exceeded speed of light?
  4990. How relativity could explain this engineering problem.
  4991. Embedding Diagrams
  4992. A variation of Twin paradox
  4993. Time Dilation and Length Contraction the same thing?
  4994. If FTL was true, shouldn't SETI start searching patterns also in neutrino bursts?
  4995. Gravitational field calculation question
  4996. Light clock question
  4997. Field of moving point charge
  4998. Light through a Coke bottle
  4999. Thought Experiment regarding Time
  5000. Is nonholonomic Xformation = Diffeomorphism