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 dimensional problem in relativistic mechanics
- ShayanJ
- · Replies 2 ·
Undergrad Does the frequency of light change as I travel toward it?
- cubud
- · Replies 9 ·
Undergrad Velocities - how relative are they really?
- antred
- · Replies 16 ·
Graduate Relativistic Optics: Recommended Texts for Deeper Learning
- ralqs
- · Replies 1 ·
Graduate How are Christoffel symbols different in rotating reference frames?
- Jonnyb42
- · Replies 7 ·
Graduate Gravity can still be caused by force?
- rogerl
- · Replies 12 ·
Graduate Scenario in an attempt to understand relativity
- CosmicVoyager
- · Replies 55 ·
Graduate Why do we need gravitons if gravity is curved spacetime?
- LeeJeffries
- · Replies 2 ·
Graduate Does this scenario disprove relativity?
- erics
- · Replies 6 ·
Graduate Mach's principle and boundary cases
- happyfunbot
- · Replies 9 ·
Graduate Tensor Questions: Significance & Using Einstein's Equations
- khemist
- · Replies 8 ·
Graduate Do Black Holes Evaporate Despite Cosmic Microwave Background Radiation?
- Lapidus
- · Replies 4 ·
Graduate Tortoise-like coordinate transform for interior metric
- FunkyDwarf
- · Replies 1 ·
Graduate Simple relativistic harmonic oscillator
- photonist
- · Replies 4 ·
Graduate Newtonian limit to schwarschild radial geodesic
- vaibhavtewari
- · Replies 2 ·
Graduate Relativity Theory: Satellite Time Loss/Gain in Orbit
- Bjarne
- · Replies 8 ·
Undergrad Simple relativity question [two ships]
- nearc
- · Replies 9 ·
Graduate Any good references of Petrov Classification?
- yicong2011
- · Replies 4 ·
Graduate Twin paradox, what about ageing?
- oraclelive
- · Replies 24 ·
Undergrad General relativity and jet travel makes you fat?
- pletharoe
- · Replies 7 ·
Graduate Special Relativity and Enganglement
- bobc2
- · Replies 33 ·
Graduate How Do The Definition Of Inertial In Relativity Relate To General Mechanics
- hprog
- · Replies 15 ·
Graduate Why does relativity cause Mercury's orbit to precess 43 arc seconds per century?
- Bjarne
- · Replies 37 ·
Graduate Why can't a particle accelerate to light speed in its own frame?
- Shark 774
- · Replies 3 ·
Undergrad Why does the stone stop before reaching the surface at the other end?
- Bjarne
- · Replies 1 ·
Graduate Is there an invariant tensor for metric under all 10 motions?
- jfy4
- · Replies 11 ·
Graduate Carlip's explanation of lack of gravitational aberration
- hkyriazi
- · Replies 4 ·
Graduate A oarticle traveling at c is length contracted to what?
- CosmicVoyager
- · Replies 16 ·
Graduate Length Contraction causes Time Dilation?
- Max™
- · Replies 111 ·
Graduate Do I have time dilation right?
- Wakefulpanda
- · Replies 6 ·
Graduate Tensor algebra with derivative of the metric
- jmlaniel
- · Replies 9 ·
Graduate Why is gravitational aberration set to zero if gravity propagates at light speed?
- sjw40364
- · Replies 15 ·
Graduate Time elapsed for observer (from POV of Traveler)
- Wakefulpanda
- · Replies 2 ·
Graduate The part of relativity I never got, reference frame
- Mr.Bigg
- · Replies 19 ·
Graduate Nullity of wave 4 - vector for grav. plane wave
- WannabeNewton
- · Replies 1 ·
Graduate Does Money Have Inertia When Orbiting a Black Hole?
- pervect
- · Replies 4 ·
Graduate If you were traveling in a spaceship that had a velocity JUST under light speed
- CombustionMan
- · Replies 4 ·
Graduate How can a train appear shorter to an outside observer due to its speed?
- arkain
- · Replies 38 ·
Graduate Space time distortion grid representations
- Darlo770
- · Replies 4 ·
12 year old autistic savant claims theory of relavitiy is wrong
- FishmanGeertz
- · Replies 4 ·
Graduate Does the Lorentz Force Magnitude Change Between Inertial Frames?
- silmaril89
- · Replies 2 ·
Graduate Angular momentum conservation.
- andrewr
- · Replies 3 ·
Graduate Accelerating trajectories in relativity
- twinsen
- · Replies 3 ·
Graduate Why can't you exceed c by accelerating in a reference frame moving at relativistic speed?
- KrisOhn
- · Replies 6 ·
Graduate Geodesics on a cone in flat space
- WannabeNewton
- · Replies 3 ·
Graduate Can the densest possible mass in the universe pull all galaxies toward it?
- Snax
- · Replies 1 ·
Graduate What is the alternative form of the extrinsic curvature in Carroll App D?
- LAHLH
- · Replies 2 ·
Graduate Calculating Light Travel Time in a Moving Reference Frame
- Salamon
- · Replies 8 ·
Graduate If two trains traveling at 0.5c collide head on
- CombustionMan
- · Replies 4 ·
Graduate Weight Measurement on Mutually Orbiting Planets
- Jonnyb42
- · Replies 1 ·
Graduate Diffeomorphism Invariance in GR
- rogerl
- · Replies 17 ·
Graduate Lorentz Invariant Vectors and Grammatical Errors
- Phrak
- · Replies 10 ·
Graduate Self-replicating fields in EM radiation?
- Saw
- · Replies 17 ·
Undergrad Can Gravity Affect the Laws of Physics?
- Spiritriser
- · Replies 3 ·
Graduate Mass inflation exactly equals time dilation?
- HarryWertM
- · Replies 2 ·
Graduate Which Clock Accumulates More Time in the Train Paradox of Relativity?
- CrtY
- · Replies 13 ·
Graduate Why Don't Quantum Mechanics and General Relativity Overlap?
- unchained1978
- · Replies 1 ·
Graduate Do decelerating electrons lose mass, and how is energy conserved?
- HarryWertM
- · Replies 3 ·
High School Can gravitational influence be measured?
- AstrophysicsX
- · Replies 6 ·
Graduate Interactive space-time diagrams for special relativity and gravitation
- A.T.
- · Replies 4 ·
Graduate Simultaneity in General Relativity and Problem with coordinate systems concepts.
- MManuel Abad
- · Replies 4 ·
Graduate Why Does Griffiths Use Two Directions of Light in His Length Contraction Proof?
- maxverywell
- · Replies 2 ·
Graduate Amplitude of wave stretched as well as red shift?
- SteveinLondon
- · Replies 11 ·
Graduate Does light have constant speed or only appear constant when measured?
- CosmicVoyager
- · Replies 65 ·
Undergrad How Does Newton's Gravitational Constant G Fit into Einstein's Relativity?
- Hebob80
- · Replies 19 ·
Graduate Schwarzschild vs Gullstrand–Painleve and event horizons
- Pittman
- · Replies 2 ·
Graduate Gravitational mass defect, weyl metric
- ArthurB
- · Replies 8 ·
High School Hair brained, universal mapping theory (nonsense ?)
- TinyZorro
- · Replies 8 ·
Graduate Can X4 Be Regarded as Spatial?
- bobc2
- · Replies 4 ·
High School Speed of Gravity: Learn What it is and How it Works
- xchaos01
- · Replies 2 ·
Graduate What Are the Killing Vectors of the Schwarzschild Metric?
- jfy4
- · Replies 20 ·
Graduate Is mass the same thing as bent space?
- brian44cali
- · Replies 5 ·
Graduate Space Probe vs the Sun - Relativistic Frames of Reference
- Loudzoo
- · Replies 41 ·
Graduate Lorentz Invariance as local limit of Bigger Manifold
- rogerl
- · Replies 2 ·
Undergrad Which quantities are invariant in special relativity?
- ShayanJ
- · Replies 7 ·
Graduate How does the length contraction work for proper length?
- Ashuron
- · Replies 8 ·
Graduate What happens to density as speed increases?
- Pragz
- · Replies 5 ·
Undergrad If Earth's orbital speed doubled, would its mass and gravity double?
- Scootty83
- · Replies 13 ·
Graduate 'Mass' of an object at different positions in a weak gravitational field
- TobyC
- · Replies 40 ·
Graduate Is spacetime curvature real or just mathematical convenience?
- dm4b
- · Replies 23 ·
Graduate Kinetic energy and curved space-time
- jfy4
- · Replies 4 ·
Undergrad Why Do People Age Slower When Traveling Near the Speed of Light?
- osiris774
- · Replies 28 ·
Graduate Understanding Special Relativity: Train Example and Time Dilation Explained
- Chuck37
- · Replies 5 ·
Graduate Dynamics of self-gravitating dust
- tom.stoer
- · Replies 3 ·
Graduate Why does a key drop to the floor when released from my hand?
- Per T
- · Replies 9 ·
Graduate Does Heat Energy Increase the Rest Mass of a Substance?
- nhmllr
- · Replies 4 ·
Graduate Can a spinning disc have a rim moving faster than c?
- diligence
- · Replies 8 ·
Undergrad Is Mass Really Condensed Energy
- onycho
- · Replies 23 ·
Graduate How did Fizeau deduce velocity from fringe shifts in moving media?
- lenfromkits
- · Replies 16 ·
Graduate Event horizons, Killing horizons and Rindler metric near black hole horizons
- off-diagonal
- · Replies 5 ·
Graduate Time dilation yes, why no contraction?
- fatdad
- · Replies 4 ·
Graduate Is the Reissner-Nordström repulsion real?
- bcrowell
- · Replies 5 ·
Graduate The origin of the inverse square law
- lugita15
- · Replies 24 ·
Graduate Can Jim and Midge communicate through a time-reversal window?
- Endervhar
- · Replies 24 ·
Graduate Gravitation of moving objects
- johank
- · Replies 1 ·
Graduate Can Einstein's equivalence principle derive GR from the particle action?
- friend
- · Replies 16 ·
Graduate Why faster than light travel is impossible if light speed is constant to all observers
- runeks
- · Replies 9 ·
Undergrad Cause of Gravitation: What Is It?
- aqua_s
- · Replies 3 ·
Graduate Antigravity in General Relativity
- rogerl
- · Replies 8 ·
Graduate Clock Acceleration in a Spacecraft: Calculating Variation Post-Acceleration
- striphe
- · Replies 1 ·