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 Does time dilation affect only the measurement of time?
- Tomvader1988
- · Replies 20 ·
Graduate Do we move in the Universe? Or is everything stationary
- Jaami M.
- · Replies 32 ·
Graduate Gravitating Body Acceleration: Bob vs Jim
- jartsa
- · Replies 12 ·
Graduate Necessary conditions for a Penrose diagram?
- bcrowell
- · Replies 5 ·
Graduate If the concept of relativistic mass is rejected....
- hidex
- · Replies 8 ·
Undergrad Why Does Momentum Matter for Space but Not Time?
- TimeRip496
- · Replies 1 ·
Undergrad Which is Moving Faster? Basic Question Explained
- zmqp
- · Replies 4 ·
Graduate Determine Absolute Speed Using Time Dilation
- Gaz
- · Replies 2 ·
Graduate Why Is the K/r^2 Formula Incompatible with Special Relativity?
- Sphinx
- · Replies 28 ·
Graduate Gravitational Paradox: Solving the Unsolvable
- Einstein's Cat
- · Replies 1 ·
Graduate Surpassing the speed of light? Why not?
- quincy harman
- · Replies 28 ·
Graduate The Mysterious Synchronization of Clocks in Special Relativity
- shlosmem
- · Replies 7 ·
Graduate What is the transformation law for tensor components in differential geometry?
- shooride
- · Replies 15 ·
Graduate Directional Derivative of Ricci Scalar: Lev-Civita Connection?
- loops496
- · Replies 4 ·
Graduate Is this magnetic wormhole really a wormhole?
- FreeThinking
- · Replies 6 ·
Graduate Partial Derivative of x^2 on Manifold (M,g)
- shooride
- · Replies 5 ·
Graduate Questions on tensors in GR and the Newtonian limit
- dyn
- · Replies 27 ·
Graduate Closed system Energy transformation
- RyanH42
- · Replies 6 ·
Graduate Every event is simultaneous with you at some time: proof?
- bcrowell
- · Replies 30 ·
Graduate Connection between Einstein-Cartan and "Baby Universes"
- stevendaryl
- · Replies 13 ·
Insights Relativistic Work-kinetic Energy Theorem - Comments
- bcrowell
- · Replies 20 ·
Graduate In c-v what is v, the train's speed relative to?
- DAC
- · Replies 28 ·
High School Machian Relativity: New Theory Glyn Phillips Can't Disprove
- a_potato
- · Replies 1 ·
Graduate Computational General Relativity
- dylanreynolds1
- · Replies 5 ·
Undergrad Calculating the Riemann Tensor for a 4D Sphere
- Mr-R
- · Replies 28 ·
Graduate Puzzle of negative result of Michelson Morley experiment
- mdn
- · Replies 3 ·
Graduate What is a nonscalar curvature singularity?
- pervect
- · Replies 8 ·
Graduate What Happens When Your Spaceship Is Longer Than the Universe?
- Idunno
- · Replies 1 ·
Graduate Could extreme time dilation ever be directly observed?
- Louis Philippe
- · Replies 15 ·
High School Bell spaceship paradox - qualitatively
- Dadface
- · Replies 21 ·
Graduate Bell spaceship paradox quantitatively
- vanhees71
- · Replies 42 ·
Insights A Short Proof of Birkhoff's Theorem - Comments
- PeterDonis
- · Replies 8 ·
Graduate Question regarding a twin paradox related example
- Yichao Liu
- · Replies 13 ·
Graduate Definition for curvature of worldline in Minkowski space
- JD96
- · Replies 6 ·
High School Extreme Gravity Waves: A Phenomenon That Can Alter Time on Earth
- magi
- · Replies 20 ·
Graduate Faster Than Light: Nullifying Mass with E=MC2
- Madpoet626
- · Replies 7 ·
Graduate Why are massless photons affected by gravity?
- jtbell
- · Replies 2 ·
Undergrad Gravitational Effect: 2 Masses N, 2 Larger Masses Further Apart
- Einstein's Cat
- · Replies 7 ·
Graduate Can Time Stop in a Gravity-Free Space?
- Neuro51
- · Replies 3 ·
Undergrad Time Conundrum: Angel vs Man View
- fxdung
- · Replies 3 ·
Graduate Why is gravity but not EM 'ripples' in spacetime?
- Finny
- · Replies 17 ·
Insights Centrifugal Force Reversal Near A Black Hole - Comments
- PeterDonis
- · Replies 15 ·
Undergrad Why the speed of light is constant?
- Sturk200
- · Replies 72 ·
Graduate How quickly does a change in gravity affect its surrounding?
- Fowler
- · Replies 2 ·
Graduate Relativistic Doppler and Hubble's law
- giulio_hep
- · Replies 11 ·
Graduate Curvature of spacetime inside hollow sphere
- Tony Stark
- · Replies 5 ·
Graduate Time dilation and speed of light
- DAC
- · Replies 17 ·
Undergrad ?Understanding Special Relativity: Speed Addition & Subtraction
- thecosmos123456
- · Replies 3 ·
Graduate Difference Between Special & General Relativity
- Jaami M.
- · Replies 5 ·
Undergrad Question about gravity and speed of light
- apurvmj
- · Replies 50 ·
Graduate Why is it that light has momentum?
- Cole
- · Replies 26 ·
Graduate Why does warping space time still violate causality?
- Keln
- · Replies 2 ·
Graduate Why is Gravity Sensitive to Absolute Energy?
- "Don't panic!"
- · Replies 10 ·
Graduate Finite tidal forces at black hole event horizon redux
- pervect
- · Replies 9 ·
Graduate What Are the Key Insights on the Newtonian Limit of General Relativity?
- pseudoriemann
- · Replies 35 ·
Graduate Spaghettification near event horizon
- Stephanus
- · Replies 35 ·
Graduate Can Light Orbit a Massive Object?
- H Smith 94
- · Replies 2 ·
Graduate What's wrong with a flat, empty, and expanding universe?
- Steve Crow
- · Replies 14 ·
Graduate Are time dilation experiments conclusive?
- Boro Petrovic
- · Replies 63 ·
Graduate Exterior derivative of hodge dual
- JorisL
- · Replies 10 ·
Graduate Geodesic Transport of Small 2D Surface on 3D Manifold
- dismachaerus
- · Replies 2 ·
Graduate Geometric representation of a tensor
- CASPIDE
- · Replies 16 ·
High School How did spacetime pop out into existence?
- dismachaerus
- · Replies 33 ·
Insights What Is the Bell Spaceship Paradox, and How Is It Resolved? - Comments
- bcrowell
- · Replies 27 ·
Graduate Geodesic Eq: Deriving 2nd Term on RHS
- peterpang1994
- · Replies 1 ·
Graduate Null geodesics and null curves
- blueelectrons
- · Replies 3 ·
High School Is there a connection between gravity and the pace of time?
- Angstrom's Muse
- · Replies 16 ·
Graduate Runaway solutions and the equivalence principle
- bcrowell
- · Replies 9 ·
Graduate Why does length contraction not cause Black holes?
- Justice Hunter
- · Replies 3 ·
Undergrad How Much Time Do We Actually Occupy in the Universe?
- hlustisa
- · Replies 9 ·
Graduate Measuring 4-Vectors: Is It Possible?
- Ken G
- · Replies 10 ·
Graduate Time-orientability of Lorentzian manifolds
- loislane
- · Replies 21 ·
Graduate Does a black hole have a surface area?
- Stephanus
- · Replies 5 ·
Graduate Implications of Light Orbiting Black Holes
- ScientificMind
- · Replies 5 ·
Graduate Some questions regarding speed of light?
- supermankid
- · Replies 8 ·
Graduate Where does photon energy go in universe expansion?
- samsara15
- · Replies 3 ·
Undergrad Modeling of measurements in relativity
- Ken G
- · Replies 11 ·
Undergrad Special relativity -- 2 parallel space ships & time perception....
- Josh S Thompson
- · Replies 17 ·
Graduate Is There a Limit to the Size of a Black Hole?
- Keith
- · Replies 10 ·
Graduate Trying to prove a consequence of harmonic gauge in GR
- hideelo
- · Replies 7 ·
Graduate Why an Infinite Lattice Cannot Be Stable: An Analysis of Peter Donis' Answers
- Helios
- · Replies 17 ·
Graduate Local Geometry of General Relativity Theory
- mikeeey
- · Replies 6 ·
Graduate Is this the one way speed of light?
- DAC
- · Replies 4 ·
Undergrad Time Dilation & Doppler Effect: Conclusions?
- Gaz
- · Replies 16 ·
Graduate Testing Understanding: Conformally Flat Space-Time
- Markus Hanke
- · Replies 15 ·
Graduate Does Space Expansion Add Potential Energy?
- Daniel Bolstad
- · Replies 16 ·
Graduate Whether gravitons can exist or not
- Einstein's Cat
- · Replies 1 ·
Graduate Can We Make Velocity Greater Than Speed of Light?
- Auror
- · Replies 10 ·
High School Do Gravitational Time Dilation and Redshift Contradict Each Other?
- P.Schuurmans
- · Replies 27 ·
Graduate GR: Signature & Dimension of Embedding Space
- dismachaerus
- · Replies 2 ·
Graduate How does curved space-time produce acceleration?
- xcourrier
- · Replies 25 ·
Undergrad Understanding Wormholes & Black Holes: An Exploration by Ed
- EdLeMarchant
- · Replies 5 ·
Graduate Coarse-Grained Einstein Tensor from Weyl Tensor
- stevendaryl
- · Replies 2 ·
Graduate Mass of Electron: Relativity & Its Definite Mass
- Einstein Jr.
- · Replies 20 ·
Graduate Couple of questions regarding general relativity?
- Christian Grey
- · Replies 3 ·
Graduate Stress Energy Tensor Components
- space-time
- · Replies 14 ·
Graduate How to find gravity using general relativity?
- Christian Grey
- · Replies 13 ·
Graduate Commutator of two covariant derivatives
- ibazulic
- · Replies 5 ·
Graduate Compress Magnetic Field: What Happens When Spun at High RPM?
- MagMad
- · Replies 4 ·
Graduate Validity of Schwarzschild Metric in Real BHs
- MattRob
- · Replies 5 ·