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 Are Christoffel symbols measurable?
- waterfall
- · Replies 142 ·
Graduate What Is the Estimated Entropy of the Final Crunch in a Closed Universe?
- avery
- · Replies 2 ·
Graduate Time as Parameter in QM vs Coordinate in QFT
- waterfall
- · Replies 4 ·
Graduate Infinite Slab of Mass: Black Hole Effects
- cragar
- · Replies 8 ·
Undergrad Coordinate time and proper time.
- Moataz
- · Replies 26 ·
Graduate Can the Speed of Light be derived?
- friend
- · Replies 9 ·
Undergrad Variation in speed of light - how does it accelerate after being slowed down?
- childej
- · Replies 8 ·
Graduate Does Spacetime Always Remember Events?
- Snip3r
- · Replies 1 ·
Graduate Metric transition at a spherical mass shell in GR
- Q-reeus
- · Replies 202 ·
Graduate Is there a relativistic version of the work-energy theorem?
- jaketodd
- · Replies 4 ·
Undergrad When is it ok to use non-relativistic equations?
- jaketodd
- · Replies 5 ·
Graduate Length contraction near the speed of light
- chrispegg
- · Replies 3 ·
Graduate How did Einstein intuitively discover spacetime curvature without tensors?
- dpa
- · Replies 6 ·
Graduate What's Wrong With Black Hole Thermodynamics?
- juanrga
- · Replies 48 ·
Graduate What is general relativity in one irreducible simple sentence?
- Helicobacter
- · Replies 13 ·
Graduate Massive observers with light speed when crossing the event horizon
- Lapidus
- · Replies 16 ·
Graduate Relative Black Holes: Can Particles See Universes of Them?
- JPBenowitz
- · Replies 1 ·
Graduate One way speed of light and simultaneity
- mananvpanchal
- · Replies 14 ·
Graduate Writing Tensor Equations in Matrix Form
- lugita15
- · Replies 1 ·
Graduate Lapse function and spacetime splicing
- Matterwave
- · Replies 29 ·
Graduate Why does the outbound leg look long and inbound leg short to the stationary twin?
- mananvpanchal
- · Replies 24 ·
Undergrad Using Mathematica for 4 vectors and etc.
- drmcninja
- · Replies 5 ·
Graduate When Does the Future Stop Being Mapped Out in Special Relativity?
- paulselhi
- · Replies 47 ·
Graduate Is your information destroyed when you reach the singularity
- jadrian
- · Replies 3 ·
Graduate Does entropy actually enter a black hole given infinite time dilation?
- pet_henry
- · Replies 3 ·
Graduate Time flow on other planets or galaxies
- tattoo_manu
- · Replies 2 ·
Graduate Escaping a Black Hole's Event Horizon
- cyborg6060
- · Replies 5 ·
Why isnt a bh singularity a reference point?
- jadrian
- · Replies 1 ·
Graduate Deriving time dilation from length contraction with moving ruler
- digi99
- · Replies 9 ·
Graduate BREAKING NEWS: Error Undoes Faster-Than-Light Neutrino Results
- csmcmillion
- · Replies 1 ·
Undergrad Why does the train observer see non-simultaneous lightning if light speed is constant?
- printfede
- · Replies 2 ·
Graduate A simple resource about tensors
- Yhaz
- · Replies 3 ·
Graduate Can other planets' orbital precession rates test alternative gravity models?
- SinghRP
- · Replies 12 ·
Graduate Is there a direct relationship between time and space in special relativity?
- ShayanJ
- · Replies 17 ·
Graduate Can Quantum Mechanics Explain True Randomness?
- jadrian
- · Replies 5 ·
Graduate Multiple images in gravitaional lensing
- Agerhell
- · Replies 6 ·
Graduate Status of relativistic 2-body problem
- HeavyWater
- · Replies 21 ·
Graduate Time Contraction in Lorentz Transforms?
- cynopolis
- · Replies 4 ·
Undergrad What forces do act upon light?
- lightconstant
- · Replies 20 ·
Graduate Varying Intensity of Gravitational Field and Equivalence
- Charlie G
- · Replies 3 ·
Graduate How does my special relativity simulator work?
- markosr
- · Replies 2 ·
Graduate Does a black hole evaporate before you reach its event horizon?
- jadrian
- · Replies 7 ·
Graduate Can spatial and temporal translation symmetry imply Lorentz invariance?
- dEdt
- · Replies 5 ·
Graduate Is General Relativity Really About Physics on Curved Spacetimes?
- waterfall
- · Replies 36 ·
Undergrad Black hole lifespan, what happens in the end?
- jadrian
- · Replies 1 ·
Graduate The Relativity Of Simultaneity.
- siddharth5129
- · Replies 3 ·
Graduate Is the order of the events reversed here?
- Adel Makram
- · Replies 15 ·
Graduate Does g increase asymptotically near a black hole singularity or event horizon?
- pawprint
- · Replies 14 ·
Undergrad Is General Relativity More Accurate for Planetary Calculations?
- avery
- · Replies 7 ·
Graduate Does gravity attract instantaneously?
- jadrian
- · Replies 4 ·
Graduate Original problem with maxwell's that led to special relativity
- idea2000
- · Replies 3 ·
Graduate GR: Why does space HAVE to contract in a gravitational well?
- dsoodak
- · Replies 1 ·
Graduate Can reality be defined other than at a point?
- jadrian
- · Replies 6 ·
Graduate Time-retarded E-field and Gaussian surface integral
- kmarinas86
- · Replies 14 ·
Graduate Einstein Tensor; What is wrong here?
- nobraner
- · Replies 4 ·
Graduate What were the first technologie to be based on SR and GR?
- mjpam
- · Replies 13 ·
Graduate Wouldn't The Time Being Relative Be A Product Of Space Curvature Near Mass
- Sarcastic14
- · Replies 8 ·
Graduate Time Moves Forward for Obvious Reason?
- PMichaud
- · Replies 81 ·
Graduate Why does the spinning observer see the moon move faster than light?
- surajt88
- · Replies 2 ·
Graduate Rearranging s/c to t/y in relativity derivation
- DPR
- · Replies 8 ·
Graduate Difference between relativistic doppler effect and classical one?
- lightconstant
- · Replies 2 ·
Graduate What happens when two length contracted ladders move through the same garage?
- kmarinas86
- · Replies 2 ·
Graduate What is linearized GR and how does it relate to Riemannian geometry?
- waterfall
- · Replies 3 ·
Graduate Does light recalibrate its speed?
- kwestion
- · Replies 6 ·
Graduate Why does gravity bend light if photons have no mass?
- Eepl
- · Replies 37 ·
Undergrad Why does light appear to travel diagonally in a light clock for a stationary observer?
- mananvpanchal
- · Replies 31 ·
Graduate Rest frame through a force field possible (time dilation) ?
- digi99
- · Replies 6 ·
Graduate LT of the magnetic vector potential when the scalar potential=0
- kmarinas86
- · Replies 10 ·
Graduate How much mass causes gravitational time dilation to zero?
- salvestrom
- · Replies 34 ·
Graduate Why does length contraction affect one mirror clock but not the other?
- intervoxel
- · Replies 5 ·
Graduate Schwarzschild's solution, classical (local) GR tests and general covariance
- TrickyDicky
- · Replies 6 ·
High School Is 'straightness' relative to earths curviture?
- a1993h
- · Replies 19 ·
Graduate The Doppler Effect: Impact of Relative Motion on Light Waves
- mananvpanchal
- · Replies 5 ·
Graduate How Does Motion Impact Pendulum Clock Accuracy?
- mangaroosh
- · Replies 9 ·
Graduate Weight direction and gravity in Einstein's equivalence principle elevator
- zarmewa
- · Replies 7 ·
Graduate Understanding Lovelock Gravity Theory and Riemman Tensor
- alejandrito29
- · Replies 2 ·
Graduate Understanding Negative t Coordinates in Lorentz Transformations
- dpa
- · Replies 5 ·
Graduate What is the relationship between the equation E^2 - p^2c^2 = m^2c^4
- meowchow
- · Replies 4 ·
Graduate Flat spacetime + gravitons = Curved spacetime?
- waterfall
- · Replies 4 ·
High School 1 minute to deliver a baby in speed of light ?
- reko
- · Replies 11 ·
Graduate Stellar aberation, a One way measurement of c?
- Tracer
- · Replies 74 ·
Graduate Relativity vs competing theories
- mangaroosh
- · Replies 70 ·
Graduate Acceleration doesn't cause the Twin Paradox?
- starfish99
- · Replies 45 ·
Graduate Exactly how is causality violated by superluminal travel?
- Ghidrah
- · Replies 32 ·
Graduate Modern Physics view of Length Contraction?
- meBigGuy
- · Replies 50 ·
Undergrad Time dilation explaination with mechanical clock instead of light clock
- R Power
- · Replies 55 ·
Undergrad Why is the speed of light squared the multiplier in E=mc²?
- Mileman10
- · Replies 57 ·
Graduate Can Anything Move Beyond the Speed of Light?
- wishiwassmart
- · Replies 5 ·
Graduate Is the interval the height of the triangle?
- Saw
- · Replies 31 ·
Graduate Poincare vs Lorentz Group
- waterfall
- · Replies 9 ·
Graduate Some remarks on Einstein's 1907 paper on Relativity
- harrylin
- · Replies 12 ·
Graduate Time Dilation Scenario: Einstein's Skaters on a Moving Conveyor Belt
- zarmewa
- · Replies 8 ·
Graduate Different gravitational fields from different reference points
- cbell39
- · Replies 2 ·
Graduate Jerk in Gravitation: Are Accelerations Equal in Cases of Varying Distances?
- nDever
- · Replies 3 ·
Undergrad What would a human feel flying at the speed of sound?
- Albertgauss
- · Replies 31 ·
Graduate How are the clock hypothesis and Unruh effect reconciled.
- Naty1
- · Replies 16 ·
Graduate Where does a photon get it's infinite energy from?
- emirhasa
- · Replies 28 ·
Graduate Time delation or clock malfunction
- R Power
- · Replies 10 ·
Graduate What is the relativistic equation for finding kinetic energy?
- Ralphonsicus
- · Replies 6 ·
Graduate In space with no reference frame, who ages in the twin paradox?
- Physicist1231
- · Replies 26 ·