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 A bench-top test of special relativity ?
- Mentz114
- · Replies 10 ·
Graduate Question on Effective Potential
- mysearch
- · Replies 111 ·
Graduate Equivalence principle violation for stressed bodies in asynchronous relativity
- yuiop
- · Replies 5 ·
Undergrad Deriving Law of Conservation of Energy from E=MC2
- superdirt
- · Replies 21 ·
Graduate Can Lorentz transformations determine the middle point on a photon's worldline?
- tomprice
- · Replies 10 ·
How Thick is Space If It's Flat?
- rab99
- · Replies 5 ·
Graduate 4-velocity, the mass shell and potential energy
- pellman
- · Replies 3 ·
Graduate Do photons attract each other gravitationally?
- duordi
- · Replies 10 ·
Undergrad Thought experiment on potential energy
- snoopies622
- · Replies 34 ·
Graduate Wave equation in curved spacetime
- Pacopag
- · Replies 4 ·
Graduate How can photons have zero rest mass but nonzero momentum?
- dkgolfer16
- · Replies 10 ·
Graduate How Does Time Dilation Affect Clocks in Different Frames of Reference?
- rab99
- · Replies 36 ·
Graduate Is there a limiting speed for particles due to energy loss in acceleration?
- hartlw
- · Replies 1 ·
Graduate Object Falling into a Black Hole: What Happens?
- michael879
- · Replies 6 ·
Graduate Accelerating Twice: Astronaut Achieves .99999c in Nuclear Ship
- Buckethead
- · Replies 9 ·
Undergrad How does the speed of light affect the rotation of a disc?
- zarbanx
- · Replies 36 ·
Who is the author of mathpages.com?
- Chris Hillman
- · Replies 9 ·
Graduate Why is the 3 momentum represented with a negative sign in the 4-vector?
- Davio
- · Replies 8 ·
Graduate Is Time Travel Possible and What Are Its Implications?
- mlw
- · Replies 55 ·
Graduate How does an object know that it is in motion?
- korinteren
- · Replies 22 ·
Undergrad Creating a Common Frame of Reference for Remote Astronauts
- rab99
- · Replies 8 ·
Graduate What happens to the pythagorean theorem in a non-euclidean space?
- Ulysees
- · Replies 14 ·
Graduate Does the equivalence principle imply nonlinearity of Einstein's equations?
- 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 Why is there a speed limit for light and particles?
- 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 by Lopis and Tegmark
- 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 Can consumer atomic clocks detect gravitational time dilation in a stairwell?
- 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 in nuclear reactions?
- 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 Can negative mass allow faster-than-light 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 How can you find an absolute reference frame if the universe is bounded?
- 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 Can a beam of light be a valid reference frame in special relativity?
- Rapt0rzzz
- · Replies 5 ·
Undergrad Twin Paradox: Jerry vs Tom's Time Dilation
- choon_min
- · Replies 1 ·
Undergrad Can relative velocity exceed the speed of light in 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 Why does the Ehrenfest paradox circumference not equal 2π times the radius?
- 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 Relativistic mass and energy in moving objects versus thermal energy
- 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 Does unequal time flow explain gravity better than a separate gravitational force?
- 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 do clocks measure time without external energy input?
- 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 Does a photon have mass?
- 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 ·