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 Why Does the Twin Paradox Not Invalidate the Theory of Relativity?
- vilas
- · Replies 7 ·
Graduate The Shape of the Universe, and General Relativity
- Radiohannah
- · Replies 6 ·
Graduate Why is the Andromeda Paradox flawed according to Penrose's book?
- ppppppp
- · Replies 14 ·
Graduate Can We See Andromeda in Real-Time Using a Near-Light Speed Telescope?
- ppppppp
- · Replies 5 ·
Graduate Gravity = warping of spacetime (doesn't make sense)
- Jonnyb42
- · Replies 40 ·
Graduate Thought Expirement, Tethered Spacecraft travelling near light speed
- Mr.Bigg
- · Replies 11 ·
Graduate How to measure speed of light?
- homer5439
- · Replies 2 ·
Where can I find Survey of gravitational radiation theory F.A.E PIRANI
- yicong2011
- · Replies 5 ·
Graduate Twin Paradox (thorough explanation needed)
- Gulli
- · Replies 190 ·
Undergrad Why does relativity break down at small scales?
- Pjpic
- · Replies 2 ·
Can black holes be considered fictional constructs?
- Red-Arrow
- · Replies 12 ·
Graduate Constant acceleration approach? =/
- Smiles302
- · Replies 4 ·
Graduate TIme Dilation & Quantum Entanglement Question
- alphauser51
- · Replies 3 ·
Graduate Space-time geometry in the absence of matter
- rodsika
- · Replies 4 ·
Graduate Big bang in Robertson - Walker space - time
- WannabeNewton
- · Replies 4 ·
Graduate Gravitational waves by analogy with Maxwell's equations
- johne1618
- · Replies 5 ·
Graduate Do you have to travel away from the observer for time to slow down?
- zeromodz
- · Replies 5 ·
Graduate What If Lorentz Invariance Violation Were Detected?
- rodsika
- · Replies 4 ·
Graduate Understanding Reduced Mass and its Role in Classical Mechanics
- andrewr
- · Replies 10 ·
Graduate Can linearized GR equations describe gravitational waves in static spacetime?
- TrickyDicky
- · Replies 80 ·
Graduate Relativity and the Heisenberg Ontology
- rodsika
- · Replies 1 ·
Graduate Q: if you travel closer to c, will you see length(distance) contraction
- ppppppp
- · Replies 3 ·
Graduate How does the Rietdijk-Putnam argument affect free will?
- Ookke
- · Replies 22 ·
Graduate Distance between two points in spacetime
- dhumidifier
- · Replies 22 ·
Graduate Energy Approximation for Small Velocity - Schutz's "A First Course in GR
- mess1n
- · Replies 1 ·
Graduate Proving Lagrangian EOM with Non-minimal Coupling
- kalish
- · Replies 3 ·
Graduate Equations of motion por a free particle in curved spacetime
- MManuel Abad
- · Replies 2 ·
Graduate Contravariant metric components
- michael879
- · Replies 1 ·
Undergrad Using relativistic effects for realistic sci-fi space travel
- Minty
- · Replies 14 ·
Undergrad What is the kinetic energy of an object traveling at the speed of light?
- joeyjo100
- · Replies 3 ·
Graduate Why is the universe's expansion accelerating despite gravitational forces?
- LeeJeffries
- · Replies 1 ·
Undergrad Speed of light not a legitamate factor in relation to mass
- Jimbrady57
- · Replies 17 ·
Graduate Why does a falling object appear frozen at the black hole horizon?
- TobyC
- · Replies 20 ·
Undergrad When people talk about the current size of the observable universe
- TobyC
- · Replies 6 ·
Graduate Finding co-frame basis vectors for a general Einstein metric
- jfy4
- · Replies 4 ·
Graduate Conservation of Energy Down The Drain?
- dm4b
- · Replies 17 ·
Graduate What would be the physical consequence of a non-metric connection?
- pellman
- · Replies 7 ·
Graduate Geodesic Motion for the Gödel Space-time
- jfy4
- · Replies 26 ·
Graduate Einstein's Theory - Is Moving Away at Speed 'c' Constant Time?
- gpsinghsandhu
- · Replies 4 ·
Graduate Max Occupation of Spacetime: Lorentz-Fitzgerald Equation
- Hebob80
- · Replies 1 ·
Graduate Do Twins Age Differently in Space Depending on Their Travel Path?
- rede96
- · Replies 12 ·
Undergrad Why is there a universal speed limit c?
- CosmicVoyager
- · Replies 210 ·
Graduate Computing the trace of the energy-momentum tensor for a fluid
- tetris11
- · Replies 5 ·
Graduate Does Absolute Zero Affect Aging Like Twin Theory?
- 42istheanswer
- · Replies 1 ·
Graduate The End of the Universe in an Instant
- JDude13
- · Replies 3 ·
Graduate Relativistic rotational kinetic energy
- johne1618
- · Replies 1 ·
Graduate How Einstein derived dT/dx' from T in his June 30 1905 paper
- larny
- · Replies 23 ·
Graduate Solutions to Field Equations with Einstein Tensor = 1
- edgepflow
- · Replies 3 ·
Undergrad What is the best way to be a relativist ?
- Dark_knight90
- · Replies 21 ·
Graduate The case for True Length = Rest Length
- rjbeery
- · Replies 371 ·
Graduate Time dilation in horizontal clock
- teodorakis
- · Replies 9 ·
Undergrad The Conundrum of Duplicating Atoms in Time Travel
- Jbcourt
- · Replies 7 ·
Graduate Radial Motion in Schwarzschild's Geometry
- Anamitra
- · Replies 47 ·
Graduate Gravity as an emergent phenomenon reading suggestions
- Lapidus
- · Replies 5 ·
Graduate Does cause precede effect in all inertial reference frames?
- kini.Amith
- · Replies 16 ·
Graduate Why is General Relativity not renormalizable?
- michael879
- · Replies 12 ·
Graduate The Affine Connection components
- Radiohannah
- · Replies 2 ·
Graduate Can neutrino or Higgs detectors reveal motion in an inertial frame?
- mjacobsca
- · Replies 1 ·
Graduate Time Dilation Puts Two Observers at different Times?
- JDude13
- · Replies 10 ·
Graduate Does an object lose mass when raised against a gravitational field?
- m.e.t.a.
- · Replies 8 ·
Graduate The Paradox of Oppositely Traveling Objects in Spacetime
- dennis83704
- · Replies 5 ·
Graduate Does an accelerating observer in Minkowski space create spacetime curvature?
- pythagoras88
- · Replies 3 ·
Graduate Tachyon - assymetry between space and time
- Dmitry67
- · Replies 7 ·
Graduate Why do we have 1D time instead of 2D time?
- Dmitry67
- · Replies 2 ·
Graduate How Is Energy Conserved in General Relativity and Cosmology?
- paweld
- · Replies 7 ·
Graduate Are fundamental particles singularities in the general relativistic sense?
- JDude13
- · Replies 2 ·
Undergrad Falling into a black hole and then shining a light?
- cragar
- · Replies 12 ·
Graduate Can we communicate with people outside a black hole?
- cragar
- · Replies 16 ·
Graduate ISV VentureStar (Avatar): acceleration problem
- TRodrigues
- · Replies 2 ·
Graduate Contraction in the Riemann Tensor
- Fraser
- · Replies 2 ·
Undergrad [Novice] Why isn't Time Space?
- JDude13
- · Replies 2 ·
Graduate Experimantal verification of GR
- paweld
- · Replies 14 ·
Graduate Dokuchaev, Is there life inside black holes?
- bcrowell
- · Replies 4 ·
Graduate Time and Light speed communication
- jfy4
- · Replies 4 ·
Graduate How can we use distances between points to define geometry?
- pervect
- · Replies 10 ·
Graduate Trying to understand what extremal proper time means.
- zeromodz
- · Replies 12 ·
Graduate Schwarzschild metric: radial coordinate and time dilation
- zeromodz
- · Replies 1 ·
Graduate Can tensors be differentiated and if so, what is the result?
- Radiohannah
- · Replies 5 ·
Graduate Properties of curvature tensor in 3 dimensions?
- im_hammer
- · Replies 3 ·
Graduate Black Hole Formation: Does it Start at the Center or Simultaneously?
- nitsuj
- · Replies 3 ·
Graduate Question regarding light clocks and time dilation.
- amk0713
- · Replies 6 ·
Graduate The speed of light with an accelerating observer.
- postermmxvi
- · Replies 7 ·
Graduate Creating a black hole with any mass?
- Nickj800
- · Replies 3 ·
Graduate Singularities, Density, and the Planck Length
- TeslaTrevor
- · Replies 14 ·
Undergrad Variability of the speed of light
- skyelectric
- · Replies 29 ·
Graduate Can you turn a black hole inside out with charge?
- Antiphon
- · Replies 8 ·
Graduate Why does a GPS satellite clock tick slower if it's in zero gravity?
- vector22
- · Replies 21 ·
High School Does time exist in the same way that space does?
- jerrok
- · Replies 10 ·
Graduate Are the forces of gravity subject to the Doppler effect?
- kmarinas86
- · Replies 8 ·
Graduate Hawking Radiation w/out black holes
- Pengwuino
- · Replies 4 ·
Graduate How are relativistic quantities derived from the constancy of c?
- SeventhSigma
- · Replies 11 ·
Graduate Mathematical Skills for Understanding General and Special Relativity
- Aaronvan
- · Replies 4 ·
Graduate Wald: Ch. 2, Problem 8.b
- Rasalhague
- · Replies 4 ·
Graduate Understanding Stellar Aberration and Its Relationship to Transverse Velocity
- kmarinas86
- · Replies 12 ·
Graduate How to calculate if a parallel-transported vector returns unchanged
- JustinLevy
- · Replies 14 ·
Graduate Is there any good reference of tetrad in GR
- yicong2011
- · Replies 2 ·
Graduate Spacetime doesn't really exist does it?
- andrewkirk
- · Replies 43 ·
Graduate Manifold / Atlas / Chart (Building Simple Example)
- ldechent
- · Replies 2 ·
Undergrad Why is gravity considered more mysterious than electric charge?
- manulal
- · Replies 7 ·
Graduate A dimensional problem in relativistic mechanics
- ShayanJ
- · Replies 2 ·