Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Threads
Graduate Information content of the metric, Riemannian and Ricci tensors
- LAncienne
- · Replies 6 ·
Graduate Does Particle Acceleration at the LHC Lead to an Increase in Mass?
- Force1
- · Replies 13 ·
Graduate Inverse Square Law + Special Relativity
- nassboy
- · Replies 5 ·
Graduate Unifying Relativity and Quantum Mechanics: The Challenge of Planck Units
- Andru10
- · Replies 7 ·
Graduate Stress-energy tensor: upper vs lower indices and sign convention
- lonelyphysicist
- · Replies 25 ·
Graduate Does General Relativity Explain Tension in Space-Time?
- 2keyla
- · Replies 2 ·
Graduate Time travel when velocity> light speed
- shredder666
- · Replies 3 ·
Graduate Covariant Green's function for wave equation
- jason12345
- · Replies 3 ·
Graduate Lorentz or Poincare invariant?
- xiaomaclever
- · Replies 1 ·
Graduate Does light bend in a freely falling reference frame?
- yash25
- · Replies 3 ·
Graduate You can't exceed the speed of light
- pleasuremann
- · Replies 4 ·
Graduate Speed of Light Dilation: Does Observer See Slower Beam?
- Zman
- · Replies 4 ·
Graduate The vacuum Einstein equations and flat spacetime
- xiaomaclever
- · Replies 9 ·
Graduate Why can photons travel faster than c?
- Gamish
- · Replies 8 ·
Graduate Thought experiment concerning worldlines
- SWwright
- · Replies 22 ·
Graduate Can photons mediate communication between inertial observers?
- rwestafer
- · Replies 4 ·
Graduate Conservation law at high speeds
- stevebd1
- · Replies 1 ·
Graduate Is the Speed of Light Decreasing Due to a New Interpretation of Ether?
- vin300
- · Replies 4 ·
Graduate Can the Fabric of Space-Time Break Under Extreme Mass?
- XanPaul
- · Replies 3 ·
Graduate Why is the speed of light constant and independent from the observer?
- redphoton
- · Replies 4 ·
Graduate Why Expect Gravity Waves from Distant Cosmic Events?
- jnorman
- · Replies 5 ·
Graduate Twin Paradox: Accelerating Rocket Ship from Earth in 2100
- sludgethrower
- · Replies 9 ·
Graduate Creating black holes through relative motion
- A.I.
- · Replies 7 ·
Graduate Is the Speed of Light Absolute or Relative in Special Theory of Relativity?
- astro2cosmos
- · Replies 3 ·
Graduate Do orbiting bodies fall into their sun if the system moves near light speed?
- Kalibr
- · Replies 8 ·
Undergrad Does Gravity "Lose" Pulling Power?
- Learnphysics
- · Replies 2 ·
Graduate The Fourier-Minkowski transform?
- jason12345
- · Replies 1 ·
Graduate Why doesn't the photon source recede from the photon at velocity c?
- tickle_monste
- · Replies 11 ·
Where can I find a translation of Pauli's relativity article written at age nineteen?
- Pollock
- · Replies 3 ·
Graduate Is a falling elevator a valid inertial frame?
- Austin0
- · Replies 9 ·
Graduate Why Do Spaceships Shorten When They Fly at the Speed of Light?
- menniandscience
- · Replies 2 ·
Graduate What is gauge in General Relativity?
- oldman
- · Replies 15 ·
Graduate What is a Simple Example of a Functional and Lagrangian in Gravity?
- CFDFEAGURU
- · Replies 31 ·
Graduate What is the physical meaning of Wigner rotation?
- elec-tric
- · Replies 4 ·
Undergrad Is it realy true that nothing can travel faster than light? if so, why?
- DRMOKADI
- · Replies 8 ·
Graduate General Relativity and Minkowski space question
- stolbein
- · Replies 5 ·
Graduate Structure of Minkowski Space
- Naty1
- · Replies 3 ·
Undergrad Floating in Space: Can Humans Create Their Own Orbits?
- smokering0
- · Replies 2 ·
Undergrad Mass and Speed in Special Relativity
- elec-tric
- · Replies 2 ·
Graduate Help understanding special relativity concepts please.
- earlofwessex
- · Replies 17 ·
Graduate Is the Pen on My Desk a Geodesic and Is My Room an Inertial Frame?
- wpoely
- · Replies 3 ·
Graduate Question on Space time geometry
- raknath
- · Replies 1 ·
Graduate Relativistic effects on apparent angular size
- nutgeb
- · Replies 45 ·
Graduate How Does Gravity Influence the Speed of Light in Space-Time?
- dream431ca
- · Replies 5 ·
Graduate Does spacetime curvature propagate faster than light?
- tickle_monste
- · Replies 15 ·
Graduate Why does Noether's theorem involve varying the integration region?
- Fredrik
- · Replies 11 ·
High School Why square the speed of light in E=mc²
- rasp
- · Replies 13 ·
Undergrad How fast are we really moving?
- kenthedentman
- · Replies 1 ·
Graduate Does a high-speed traveler see Earth as a black hole with a white hole exit?
- GoodPR
- · Replies 40 ·
Graduate Still learning about special relativity, .
- Wattever
- · Replies 30 ·
High School Would a spinning stick the length of Earth's diameter appear as a spiral?
- PaulRacer
- · Replies 25 ·
Graduate Einstein’s return to ether, what future of relativity?
- vacuum-mech.
- · Replies 6 ·
Undergrad What is the difference between the equivalence principle and Newton's third law?
- vin300
- · Replies 1 ·
Graduate Is c invariant in Accelerating frames?
- Austin0
- · Replies 38 ·
Graduate Gravity/Curved Spacetimes effect on Time
- TheIsland24
- · Replies 12 ·
Graduate Do Moving Trains Affect Time Synchronization?
- GofG
- · Replies 5 ·
Undergrad LaTeX for extended Coulomb's law formula
- MARTIN LOPEZ
- · Replies 11 ·
Graduate Where is My Understanding of Relativity Wrong in the Light Clock Example?
- archis
- · Replies 11 ·
High School What is the significance of squaring speed in E=mc²?
- Hallan
- · Replies 19 ·
Graduate Is there a simpler way to understand the Lorentz factor?
- rell
- · Replies 2 ·
Graduate Infinite mass = infinite gravity ?
- annatar
- · Replies 11 ·
Graduate What software do real physicists use for GR calculations?
- BWV
- · Replies 8 ·
Graduate Are My Thoughts on GR Body at Rest Correct?
- quZz
- · Replies 20 ·
Graduate Length contraction in a current carrying wire?
- maartenrvd
- · Replies 65 ·
Graduate Is Everything "Else" a Black Hole?
- aaryan0077
- · Replies 2 ·
Graduate Do electrons have relativistic angular velocity in atoms?
- MARTIN LOPEZ
- · Replies 7 ·
Graduate Is light speed faster coming from a smaller star?
- PaulRacer
- · Replies 7 ·
Graduate Significance of the Michelson-Morley experiment results and modern theory
- fillindablank
- · Replies 8 ·
Graduate Can GR be formulated as background dependent?
- ensabah6
- · Replies 5 ·
Graduate Contravariant derivative tensor problem
- rafal_
- · Replies 4 ·
Graduate Photon Trajectory in Moving Laser Pointer
- bucher
- · Replies 17 ·
Graduate Some Burning Questions about Time Dilation
- Salbris
- · Replies 14 ·
Graduate Does time dilation in the twin paradox require an absolute rest frame?
- Salbris
- · Replies 10 ·
Graduate How does spacetime curvature affect a rotating planet's velocity?
- PaulRacer
- · Replies 4 ·
High School Is Time's Speed Just Wild Speculation?
- monty37
- · Replies 168 ·
Undergrad Simultaneity of events in 2 dimensions
- techdirect
- · Replies 1 ·
Graduate A paper I heard about last year about gravity.
- bm0p700f
- · Replies 3 ·
Graduate Two Spaceships, .90c - Why No Faster Than Light?
- Somedude99
- · Replies 38 ·
Graduate What distinguishes the interior and exterior Schwarzschild metrics in Maxima?
- BWV
- · Replies 5 ·
Graduate Gravitational Redshift for Photon around Kerr Black Hole
- Ruf30
- · Replies 7 ·
Undergrad Explaining general relativity equations with high school algebra
- haloshade
- · Replies 2 ·
Undergrad Why can both astronauts validly claim the other's clock runs slower?
- amk0713
- · Replies 13 ·
Graduate Is It Possible to Integrate General Relativity and Quantum Mechanics?
- GoodPR
- · Replies 6 ·
Graduate Is Faster-Than-Light Travel Possible Relative to Other Celestial Bodies?
- GoodPR
- · Replies 85 ·
Graduate Relative Object Speed Q: Observer Moving or Hula Hoop?
- PaulRacer
- · Replies 1 ·
Graduate F.O.R. and Acceleration/Deceleration Question
- TrashmanL
- · Replies 10 ·
Graduate Atomic clocks in distant galaxies receding at 99% light speed
- Wangf
- · Replies 42 ·
Graduate Weak Equivalence Principle (WEP)
- dianaj
- · Replies 2 ·
Undergrad Special relativity fundamental question
- krindik
- · Replies 5 ·
Graduate Is the acceleration of mass A equal to mass B in Born rigid motion?
- Ironhead
- · Replies 3 ·
Graduate How do charges exchange forces faster than light travels?
- NERV
- · Replies 1 ·
Graduate Why does my spacecraft appear to travel faster than light from Earth?
- clamtrox
- · Replies 19 ·
Graduate How does relativity treat a moving black body?
- kthouz
- · Replies 3 ·
Graduate How is the twin paradox solved in the first model of the expanding universe?
- michelcolman
- · Replies 9 ·
Undergrad If I ride a photon, why does time appear stopped but people still move?
- Alladin
- · Replies 2 ·
Graduate Gravitational Effects on Atomic Clocks and Other Forces
- jreelawg
- · Replies 9 ·
Graduate Equivalence Principal, Acceleration, Curved Space
- Widdekind
- · Replies 4 ·
Graduate Gravitational collapse to form a black hole
- Finbar
- · Replies 6 ·
Undergrad When adding up velocities, is it possible to produce 1+1=1?
- Duchovnik
- · Replies 3 ·
Graduate What Do Observers See in the Special Relativity Clock Paradox?
- SpaceExplorer
- · Replies 2 ·