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 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 Understanding the Relativity-Induced Precession of Mercury's Orbit
- 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 Understanding the Speed of Gravity: GR vs. SR and the Impact on Orbital Dynamics
- 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 Solving the Mystery of Relativity: Can You Travel Faster than c?
- KrisOhn
- · Replies 6 ·
Graduate Geodesics on a cone in flat space
- WannabeNewton
- · Replies 3 ·
Graduate Theoretical Astrophysics: Superdense Mass & Gravity Pull on Galaxies?
- 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 SLAC Electrons: Mass, Velocity & EM Energy
- HarryWertM
- · Replies 3 ·
High School Can gravitational influence be measured?
- AstrophysicsX
- · Replies 6 ·
Graduate Explore Relativity with Interactive Flash Diagrams
- 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 Is the speed of light actually constant or just always measured to be the same?
- 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 Mass Bending Space: Theories Explored
- 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 Invariant Quantities in SR: Explained
- 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 Spacetime curvature: Real or Not?
- 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 Angular velocity and c: Is this a paradox? Can you explain it?
- diligence
- · Replies 8 ·
Undergrad Is Mass Really Condensed Energy
- onycho
- · Replies 23 ·
Graduate Fizeau. What is connection between fringe shifts and velocity?
- lenfromkits
- · Replies 16 ·
Graduate Question about event horizon and Rindler space
- 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 Communicating Through Time: MacBeath & Nahin's Ideas
- Endervhar
- · Replies 24 ·
Graduate Gravitation of moving objects
- johank
- · Replies 1 ·
Graduate The question is: Can GR be derived from the Einstein-Hilbert action?
- friend
- · Replies 16 ·
Graduate Faster than light travel: it either constantly happens or never
- 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 ·
Graduate Diffeomorphism and constant curvature
- jfy4
- · Replies 22 ·
Graduate How to obtain Kerr Metric via Spinors (N-P Formalism)
- yicong2011
- · Replies 5 ·
Graduate Galilei, Poincare and conformal symmetry
- Heirot
- · Replies 3 ·
Graduate Why do we perceive time to pass at the rate that we do?
- deadstar33
- · Replies 23 ·
Graduate On the Physical Separation of Time
- Anamitra
- · Replies 70 ·
Graduate How can I Bel-decompose the Riemann tensor over SO(3,3)?
- deSitter
- · Replies 4 ·
Graduate The Lorentz Transformations and the Uncertainty Principle
- Anamitra
- · Replies 3 ·
Graduate Having trouble writing down a metric in terms of metric tensor in matrix form?
- zeromodz
- · Replies 4 ·
Graduate Is Gravity Really a Force or Something Else?
- revelation101
- · Replies 9 ·