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 Equivalence principle & nonlinearity
- Thrice
- · Replies 1 ·
Graduate My response to an anti-relativist
- aaj
- · Replies 30 ·
Graduate Why is ct used as the fourth dimension in Special Relativity?
- NanakiXIII
- · Replies 14 ·
Undergrad Can Anything Travel Faster Than the Speed of Light?
- likephysics
- · Replies 5 ·
Graduate Is special relativity just an illusion of time and space?
- Denton
- · Replies 12 ·
Graduate The stress energy tensor again
- snoopies622
- · Replies 9 ·
Graduate What is the explanation for the null result in the Trouton-Noble experiment?
- erastotenes
- · Replies 2 ·
Graduate Relativity Revisited: Flora Lopis & Max Tegmark (MIT)
- robphy
- · Replies 3 ·
Graduate What is the Flaw in Applying the Lorentz Factor to Time Dilation?
- A(s)
- · Replies 30 ·
Graduate Where does the energy loss from redshifted photons go?
- josephpalazzo
- · Replies 4 ·
Undergrad Atomic clocks & general relativity
- AlfaEcosse
- · Replies 10 ·
Graduate T of t' and x of x' with respect to S
- arbol
- · Replies 10 ·
Graduate Can Time Dilation Be Used to Identify a Moving Frame of Reference?
- rab99
- · Replies 4 ·
Graduate Traveling into the future in order to travel back into the past
- Benzoate
- · Replies 11 ·
Undergrad Can You Take a Photo of Something Traveling at Light Speed?
- epithet
- · Replies 28 ·
Graduate The Lorentz Group in General Relativity
- princeton118
- · Replies 1 ·
Undergrad Is Time Dilation Only About Velocity and Massive Objects?
- rab99
- · Replies 3 ·
Graduate What Phenomenon Causes Light to Change Direction Near a Black Hole?
- Gamerex
- · Replies 5 ·
Graduate Can energy be converted into mass?
- manjuvenamma
- · Replies 10 ·
Graduate Can Photons Orbit in Flat Spacetime?
- duordi
- · Replies 1 ·
Graduate Lorentz Transformation via Rotation
- snoopies622
- · Replies 3 ·
Graduate Does General Relativity Suggest a Younger Age for a Free-Falling Twin?
- mysearch
- · Replies 6 ·
Graduate Negative Rest Mass: Faster than Light?
- Daedalus_
- · Replies 1 ·
Graduate What is the Name of the Four-Vector with p-eA?
- actionintegral
- · Replies 2 ·
Graduate Negative Mass: Possibility of FTL Travel?
- eNathan
- · Replies 38 ·
Undergrad Experiments in a revolving satellite
- manjuvenamma
- · Replies 6 ·
Graduate How to measure absolute velocity
- rab99
- · Replies 13 ·
Graduate Mass transfer between black holes
- shalayka
- · Replies 1 ·
Graduate Is the Universe Limited or Infinite? Exploring the Debate
- rab99
- · Replies 14 ·
Undergrad Born Rigid Motion - references
- pervect
- · Replies 2 ·
Graduate Lorentz invariance and General Coordinate transformations
- kdv
- · Replies 3 ·
Graduate Clock Synchronisation in Stationary and Accelerated Frames
- rab99
- · Replies 14 ·
Graduate How Does Gravity Influence Spacetime and Time Dilation?
- GRB 080319B
- · Replies 11 ·
Graduate Are Scaled and Summed Four-Vectors Still Four-Vectors?
- Dale
- · Replies 12 ·
Graduate Q: Special Relativity: Moving Light w/ Mass & Reference Frames
- Rapt0rzzz
- · Replies 5 ·
Undergrad Twin Paradox: Jerry vs Tom's Time Dilation
- choon_min
- · Replies 1 ·
Undergrad A question on special relativity
- choon_min
- · Replies 1 ·
Graduate Is the Speed of Light Really Slowing Down?
- jonegil
- · Replies 29 ·
Undergrad Bending of Light: Other Observations Beyond Eddington
- spidey
- · Replies 7 ·
Graduate Ehrenfest Paradox: Explained in Simple Terms
- aaj
- · Replies 2 ·
Graduate Does GR say anything about solid angle deficit?
- Jonathan Scott
- · Replies 4 ·
Graduate Momentum in the time direction
- snoopies622
- · Replies 4 ·
Undergrad Is Light's Gravity Influenced by Other Light?
- hvirgen
- · Replies 8 ·
Graduate How Does Relative Motion Affect Time Measurement in Different Reference Frames?
- arbol
- · Replies 9 ·
Graduate Is there a peak in the center of a GR space-time well?
- siphon
- · Replies 32 ·
Undergrad Does E=mc² fully account for an object's total energy including kinetic energy?
- frankencrank
- · Replies 16 ·
Graduate Energy, Heat & Speed: A Physics Q&A
- GRB 080319B
- · Replies 5 ·
Would Hitting a Micro Black Hole with Your Hand Create a Hole?
- Denton
- · Replies 1 ·
Undergrad Are Photons Massless But Still Have Momentum?
- dkgolfer16
- · Replies 1 ·
Graduate Questioning Zero Reference and the Expansion of the Universe
- siphon
- · Replies 2 ·
Graduate Light Speed Travel and Causality
- Violator
- · Replies 24 ·
Graduate Size of Black Hole: Swallow 1.5m x 3.585m x 20cm?
- Gramsci
- · Replies 5 ·
Graduate What Defines the Coefficient of Restitution in Relativistic Collisions?
- abhaiitg
- · Replies 21 ·
Graduate Not to defend Phrak, but i have a related question
- rbj
- · Replies 20 ·
Graduate Length contraction v. time dilation
- tomtraxler
- · Replies 4 ·
Graduate How Do New Space-Time Coordinate Transformations Impact Clock Synchronization?
- bernhard.rothenstein
- · Replies 1 ·
Graduate More Spacecraft Velocity Anomalies
- lwymarie
- · Replies 14 ·
Graduate A question regarding length contraction
- aaj
- · Replies 6 ·
Graduate Unifying Gravity and Time: Insights from General Relativity & Quantum Mechanics
- Xeinstein
- · Replies 11 ·
Graduate ModifiedGravity.htmlWhat are the limitations of General Relativity?
- MathematicalPhysicist
- · Replies 8 ·
Graduate Crossing Event Horizon of Black Hole: What Happens?
- Ironlenny
- · Replies 5 ·
Graduate How Does a Clock Measure Time?
- Phrak
- · Replies 4 ·
Graduate Is Time Dilation a Result of Matter's Intrinsic Motion?
- petm1
- · Replies 22 ·
Graduate Can You Escape the Gravitational Pull of a Black Hole?
- Xeinstein
- · Replies 2 ·
Graduate Meaning of diffeomorphism invariance?
- kdv
- · Replies 6 ·
Graduate What is Relativistic Heat Force? Any Research Papers on This Topic?
- Frank Lampard
- · Replies 5 ·
High School Does a dimension have dimensions?
- ahmedhassan72
- · Replies 13 ·
Undergrad Photon Mass: h/(lamda*c) Explained
- Rel
- · Replies 2 ·
Graduate Understanding Time and Space as One entity.
- dswam
- · Replies 92 ·
Graduate Coordinate acceleration without a Force
- the shadow
- · Replies 1 ·
Graduate Deriving gravitational redshift using the energy change approach
- Crazyevox
- · Replies 12 ·
Graduate Two-spaceship paradox This solution incorrect
- J.F.
- · Replies 46 ·
Graduate Maximum speed of anything, temperature
- Learnphysics
- · Replies 4 ·
Graduate So what has happened to the GPE (Gravitational Potential Energy)?
- Xeinstein
- · Replies 6 ·
Graduate Problem with thought experiment
- joey_m
- · Replies 27 ·
Undergrad Is Magnetism Related to Einstein's Relativity?
- Harmony
- · Replies 1 ·
Graduate Ricci tensor equals a constant times the metric
- Pacopag
- · Replies 3 ·
Graduate What's wrong with Michelson's explanation of ether dragging?
- joey_m
- · Replies 26 ·
Graduate Gravity: real force or artefact of acceleration?
- Xeinstein
- · Replies 2 ·
High School Does Gravity Move Off? Your Answers Needed
- matteo16
- · Replies 7 ·
Graduate Does Pi Relate to Space-Time's Curvature?
- hedons
- · Replies 18 ·
Graduate Time Dilation: Understanding the Effects of Special Relativity
- Xeinstein
- · Replies 4 ·
Graduate Deriving ds^2 = ds'^2 in Special Relativity
- Living_Dog
- · Replies 14 ·
Graduate Relativity: Absolute Acceleration & the Twin Paradox
- joey_m
- · Replies 15 ·
Graduate General Coordinate transfos vs Lorentz transfos in GR
- kdv
- · Replies 8 ·
Graduate Is light travel time for event time calculation usually implicit?
- DocZaius
- · Replies 5 ·
Undergrad How Do Black Holes Exert Gravity If They Absorb Light?
- sajithcv
- · Replies 1 ·
Graduate Revisiting the lesson of the Relativity of Simultaneity
- joey_m
- · Replies 30 ·
Graduate What is the answer to the Twins Paradox confusion in relativity?
- Xeinstein
- · Replies 6 ·
Undergrad Deflection angle of a ray grazing the sun
- spidey
- · Replies 2 ·
Graduate Locality, Time, Speed, Distance, and one confused person.
- kenewbie
- · Replies 9 ·
Graduate What Units Should Be Used for the Left Half of the GR Equation?
- snoopies622
- · Replies 6 ·
Graduate Understanding the Twin Paradox and Time Dilation in Relativity Theory
- Xeinstein
- · Replies 9 ·
Graduate Does a Photon Have a Lifespan?
- GearsofWar
- · Replies 32 ·
Undergrad Why Is Time Considered the 4th Dimension in Einstein's Theory?
- Xeinstein
- · Replies 5 ·
Graduate Can a Single Particle Move Without a Reference Point?
- Denton
- · Replies 2 ·
Graduate What Does the Curvature of Time Look Like in Our Perception?
- Xeinstein
- · Replies 4 ·
Graduate Derivative of the metric tensor
- Santiago
- · Replies 3 ·
Graduate Einstein's Derivation, why is light velocity c-v and c+v?
- Perspicacious
- · Replies 5 ·
Graduate Maxwell vs Newton: Contradictions in Electrodynamics and Mechanics
- rakeshsugirth
- · Replies 5 ·