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 Does the cosmological constant 'require' energy?
- Herbascious J
- · Replies 7 ·
Undergrad Why is simultaneity defined for Stanley in Einstein's train thought experiment?
- Nikitin
- · Replies 5 ·
Graduate Do orbiting satellites experience gravitational time dilation?
- Buckethead
- · Replies 32 ·
Graduate Units of spacetime in Minkowski metric
- nomadreid
- · Replies 54 ·
Graduate How do observers measure time differently on a spacetime diagram?
- rushikesh
- · Replies 20 ·
Graduate Understanding Doppler Shift for Light in Special Relativity
- SteveDC
- · Replies 3 ·
Graduate What is the problem with the Minkowski relationship in special relativity?
- John Hobson
- · Replies 4 ·
Graduate How is it that black holes can have angular momentum?
- serp777
- · Replies 6 ·
Undergrad Correct definition of time dilation
- suryanarayan
- · Replies 21 ·
Graduate How Does Time Differ for Observers in Relative Motion?
- Hepic
- · Replies 31 ·
Graduate [Question] About the radio signal for Twin Paradox
- cxcxcx0505
- · Replies 3 ·
Graduate Can the concept of negative mass shed light on the independence of momentum?
- VernonNemitz
- · Replies 12 ·
Undergrad SR Problem: Calculating Angle of Tilt of Moving Bar
- PeroK
- · Replies 6 ·
Graduate Simultaneity between events in reference frames
- PeroK
- · Replies 2 ·
Graduate Understanding the Effect of Space Curvature on Time in Relativity
- GordonFreechme
- · Replies 15 ·
Can anybody suggest any books, journals, or webs on antigravity?
- aemla
- · Replies 15 ·
Undergrad Changing magnetic field creates potential difference
- Strafespar
- · Replies 1 ·
Graduate What causes time dilation in relativity?
- spaced-out
- · Replies 62 ·
Graduate Are CTCs in the Kerr metric just an artifact of coordinates?
- yuiop
- · Replies 6 ·
Graduate Mechanism by which mass curves space
- taicleis
- · Replies 9 ·
Graduate Concept of coordinate reference frame in GR
- EventHorizon91
- · Replies 7 ·
Graduate Could a warp drive work as a time machine?
- KeplerJunior
- · Replies 51 ·
Graduate Why do gravitons exist if GR explains gravity through curved spacetime?
- copernicus1
- · Replies 4 ·
Graduate Locally non-rotating observers
- WannabeNewton
- · Replies 178 ·
Graduate Negative time difference of simultaneous events?
- chipotleaway
- · Replies 12 ·
Graduate Time Travelling at Speed of Light: What is My Time?
- Madhu R
- · Replies 5 ·
Graduate Understanding Time Dilation: Proper Time vs. Time
- zachfoltz
- · Replies 5 ·
Graduate Magnetism as a Relativistic Phenomenon
- unscientific
- · Replies 1 ·
Undergrad Newton's law of gravity or Einstein's general theory of relativity?
- Remon
- · Replies 29 ·
High School Einstein and his theory of light speed
- kimster
- · Replies 6 ·
Graduate Why Does a Bullet Fall Below a Laser Beam in General Relativity?
- noobphysicist
- · Replies 6 ·
Graduate Why does light reach the speed limit in spacetime?
- Akaisora
- · Replies 18 ·
Graduate Constant Acceleration / Deceleration Propulsion
- rajko
- · Replies 7 ·
Graduate What does vanishing Ricci tensor signify ?
- Genocide
- · Replies 1 ·
Graduate Could There be a Preferred Time in the Universe?
- kye
- · Replies 1 ·
Graduate Unbreakable pole moved in an infinite vacuum
- Gargoyle
- · Replies 1 ·
High School Does Gravity Affect How Long You Live?
- pingulii
- · Replies 1 ·
Graduate Einstein's Basis for Equivalence in his Field Equations
- McGuire
- · Replies 3 ·
Graduate Question regarding the qualitative difference between General Relativi
- Herbascious J
- · Replies 4 ·
Undergrad Moving faster than light cannot stop biological aging Or can?
- pingulii
- · Replies 20 ·
Graduate How Do You Calculate Average Acceleration in Relativistic Motion?
- pixelpuffin
- · Replies 8 ·
Graduate Can you see inside a space ship moving at the speed of light?
- adimantium
- · Replies 5 ·
Graduate Does time go backwards if object is going faster than light?
- adimantium
- · Replies 3 ·
Graduate What causes people to age differently?
- spaced-out
- · Replies 36 ·
Undergrad How to understand gravitational potential
- nenyan
- · Replies 14 ·
Graduate Have experiments demonstrated closed timelike curves via post-selection and entanglement?
- zepp0814
- · Replies 4 ·
Graduate Velocity addition formula question
- MrBillyShears
- · Replies 7 ·
Undergrad Meaning of E=mc^2: Are Mass and Energy the Same?
- jacket
- · Replies 5 ·
Graduate Einstein's Summation Convention: Questions Answered
- nenyan
- · Replies 2 ·
Graduate What happens to a photon's energy as it approaches infinity?
- tolove
- · Replies 8 ·
Graduate Why does acceleration matter in the twin paradox if time dilation depends on velocity?
- wildsman
- · Replies 20 ·
Graduate Four amateur questions about gravity and general relativity
- NotEuler
- · Replies 22 ·
Graduate Two paralel streams of electrons.
- alpha358
- · Replies 4 ·
Graduate Is There any impact of the concept of Einstein’s New Ether in science
- Trojan666ru
- · Replies 1 ·
Graduate Rotating reference frames and acceleration
- Hailcanadien
- · Replies 14 ·
Undergrad How Does the Twin Paradox Affect Aging in Space Travel?
- Hepic
- · Replies 2 ·
Graduate Properties of Lorentz-Minkowski geometry and vector classification
- nomather1471
- · Replies 4 ·
Graduate Solving Redshift of Two Kinds in Schwarzschild Metric
- WannabeNewton
- · Replies 12 ·
Graduate What Are 'M-M' and 'N-N' Circles in Russian Physics?
- nomadreid
- · Replies 2 ·
Graduate Charged particle、neutral particle will hit the ground simultaneously？
- magnetar
- · Replies 2 ·
Graduate Magnitude of Vectors in Special Relativity
- MrBillyShears
- · Replies 5 ·
Graduate Orthogonality of timelike and null vector
- nomather1471
- · Replies 7 ·
Graduate Momentum conservation in the twin paradox
- adrian_m
- · Replies 13 ·
Graduate Movement of Mass: Constant Distortion Since Universe Began
- wetwonder
- · Replies 6 ·
Graduate Frequency, Velocity and Wavelength of Light
- Nugso
- · Replies 13 ·
Graduate Using parallel propagator to derive Riemann tensor in Sean Carroll's
- victorvmotti
- · Replies 3 ·
Graduate Schwarzschild metric in terms of refractive index
- yuiop
- · Replies 5 ·
Figured Out: No Question Here!
- TysonM8
- · Replies 1 ·
Graduate Forces in relativistic rolling motion
- jartsa
- · Replies 66 ·
Graduate Quick check as to space-like and time-like
- nomadreid
- · Replies 3 ·
Undergrad Relative velocities and the speed of light
- ViolentCorpse
- · Replies 15 ·
Graduate Electron orbital the earth will radiate?
- magnetar
- · Replies 5 ·
Graduate Why haven't experiments moved the light detector instead of the source?
- Trojan666ru
- · Replies 14 ·
Undergrad Schwarzschild Radius Explanation?
- seanlee2013
- · Replies 47 ·
Graduate Changing Dot Product to Simple Multiplication
- Halaaku
- · Replies 3 ·
Graduate What Causes Length Contraction in Relativistic Speeds?
- keepit
- · Replies 6 ·
Graduate Coordinate and dual basis vectors and metric tensor
- Halaaku
- · Replies 9 ·
Graduate Asymmetric photon interaction with gravity?
- bahamagreen
- · Replies 12 ·
Graduate Doppler effect in accelerating frame.
- Ravi Mohan
- · Replies 21 ·
Undergrad Speed of Light vs Speed of Pool Ball Momentum
- donniet1977
- · Replies 14 ·
Graduate How Does Time Dilation Affect Photon Transmission in Relative Motion?
- greendog77
- · Replies 1 ·
Graduate Thought experiment with one photon
- keepit
- · Replies 7 ·
Graduate Are There Limitations to the Proven Accuracy of GR and SR?
- keepit
- · Replies 1 ·
Graduate Two Laser Emissions: Resolving Contradiction
- Whatifitaint
- · Replies 4 ·
Graduate Space-Time Warping Imaging at 1T fps - Ramesh Raskar
- dsmikk
- · Replies 3 ·
Graduate Is light slowed down when passing through a tube that exerts gravity?
- bcrelling
- · Replies 18 ·
Graduate Black holes and time invariance.
- bcrelling
- · Replies 11 ·
Graduate If there was a region of space-time shaped like a Mobius Strip
- Edward Solomo
- · Replies 1 ·
Graduate Relationship between space curvature and spacetime curvature with the Ricci scalar
- qtm912
- · Replies 5 ·
Graduate How Critical Are Relativistic Effects in GNSS Accuracy?
- thegreenlaser
- · Replies 8 ·
Graduate Why does the frequency of a light clock change when it is accelerated?
- yuiop
- · Replies 53 ·
Graduate Do nested time machines create wormholes in the Einstein field equations?
- Superposed_Cat
- · Replies 1 ·
Undergrad Are ch, sh, and th standard abbreviations for hyperbolic functions?
- nomadreid
- · Replies 4 ·
Graduate Ladder Paradox/General Relativity?
- TysonM8
- · Replies 3 ·
Graduate Timelike and Spacelike Four-vectors
- Lucy Yeats
- · Replies 15 ·
Graduate Observing a cube approaching a black hole
- EskWIRED
- · Replies 12 ·
Graduate How do we parallel transport a vector?
- pellman
- · Replies 3 ·
Graduate Does simultaneity change for an observer traveling at light speed to Alpha Centauri?
- Guybrush
- · Replies 4 ·
Graduate Is acceleration due to gravity a 4-vector?
- pellman
- · Replies 5 ·
Graduate Lienard-Wiechert potentials
- nosepot
- · Replies 5 ·