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 E=mc^2 no object with rest mass can ever reach the speed of light?
- eNathan
- · Replies 17 ·
Graduate How do we express Maxwell's equations in terms of the field tensor?
- meteorologist1
- · Replies 6 ·
Graduate Calculating Curvature of Space-Time for a Body of Mass
- Enos
- · Replies 4 ·
Graduate Does the cosmological constant change in higher dimensions?
- General_Relativity21
- · Replies 4 ·
Graduate Confusion between horizon, particle horizon and event horizon
- emanaly
- · Replies 8 ·
Undergrad Kinetic Energy Change in Particle: Earth vs Space Observation
- HungryChemist
- · Replies 2 ·
Graduate Length contraction at 0.9c with light travel time delay
- bayan
- · Replies 8 ·
Graduate Can a rotating rod exceed the speed of light?
- T-O7
- · Replies 2 ·
Undergrad Understanding Radar Guns and Speed Measurement with STR
- O Great One
- · Replies 8 ·
Graduate Is a free ballistic path a parabola or a cycloid?
- Zanket
- · Replies 28 ·
Graduate Radial fall time in Schwarzschild metric from Lagrangian
- Romeo
- · Replies 6 ·
High School What is Einstein's Twin Paradox and how does it illustrate time dilation?
- boy genius
- · Replies 2 ·
Graduate How can the Planck length be defined if lengths are relative in special relativity?
- Curious6
- · Replies 5 ·
Graduate How would you create a stable wormhole and know where it leads?
- boy genius
- · Replies 10 ·
Graduate Tramplines and Scales and Free Float
- shibbysan
- · Replies 5 ·
Graduate What Is Your Perspective on the Event Horizon?
- LocktnLoaded
- · Replies 2 ·
Graduate Moving Through the 4th Dimension - Feasible?
- jlorino
- · Replies 37 ·
Undergrad What is the difference between energy and relativistic mass?
- nwall
- · Replies 32 ·
Undergrad Question regarding the expanding universe
- Tage
- · Replies 5 ·
Graduate Why does the ADM formalism have a non-trivial spatial metric tensor?
- member 11137
- · Replies 12 ·
Undergrad Recommended books for learning general relativity and tensors
- wolram
- · Replies 10 ·
Graduate Is time truly finite or does it exist simultaneously in all moments?
- infinitetime
- · Replies 15 ·
Undergrad Where can I find Einstein's derivation of E=mc² in English?
- Iraides Belandria
- · Replies 4 ·
High School If time stopped completely, what would happen?
- Nightsky
- · Replies 8 ·
Graduate Speeding into a supersize black hole
- Anders Lundberg
- · Replies 2 ·
Graduate Can we travel into the past with space time physics?
- BenGoodchild
- · Replies 15 ·
Graduate Particles approching the speed of light
- Honorable_Death
- · Replies 17 ·
Where can I find PDF Black holes White Dwars and Neutron Stars
- Neitrino
- · Replies 2 ·
Undergrad Why do people on Earth age more than a light-speed traveler?
- clnotx
- · Replies 19 ·
Graduate General Coordinate Transformations
- Neitrino
- · Replies 2 ·
Graduate Why don't the two frames in the twin paradox see each other's clocks running slower?
- ramollari
- · Replies 130 ·
Undergrad Spinning wheel and light speed
- haynewp
- · Replies 12 ·
Graduate What is the causal structure of a black hole collapse?
- wangyi
- · Replies 14 ·
High School Can a Pocket Watch Keep Ticking at Light Speed?
- ArielGenesis
- · Replies 5 ·
Undergrad What programs are most successfull for visualization physical processess?
- Neitrino
- · Replies 3 ·
Graduate Curvatures in spacetime explained by momentum?
- michael879
- · Replies 11 ·
Graduate Does Relativity Affect Energy Conservation in Gravity-Driven Systems?
- gonzo
- · Replies 7 ·
Undergrad Time dilation and radioactive decay
- GOD__AM
- · Replies 4 ·
Graduate Why time traveling (To the past) is impossible.
- Big Evil
- · Replies 5 ·
Graduate Relativistic velocity in the time dimension
- Mortimer
- · Replies 17 ·
Undergrad What if gravity worked differently?
- Baggio
- · Replies 36 ·
Graduate Does gravitational field propagation slow down with light near black holes?
- Pizer
- · Replies 3 ·
Undergrad Is Time the Only 4th Dimension in Relativity?
- oldunion
- · Replies 7 ·
Graduate Perception and Proximity near a Black Hole: A Curious Exploration
- NoClue
- · Replies 4 ·
Graduate On photons in perpendicular directions
- Raparicio
- · Replies 3 ·
Graduate Do White Holes Create Lumps in Spacetime?
- Honorable_Death
- · Replies 15 ·
Graduate Reconciling three statements about crossing a black hole's event horizon
- Ich
- · Replies 30 ·
Undergrad At what kinetic energy do electrons become relativistic?
- IntuitioN
- · Replies 20 ·
Graduate Does increased velocity increase gravity?
- michael879
- · Replies 10 ·
Graduate Gravity and the scale of matter.
- curvedlogic
- · Replies 14 ·
Graduate Four questions on relativity, mirror reflections, virtual particles and physics
- daytripper
- · Replies 12 ·
Graduate Derivation of Christoffel symbol
- rolandk
- · Replies 10 ·
Graduate How Does Near-Light Speed Affect Satellite Pulse Reception on Earth?
- Pengwuino
- · Replies 7 ·
Graduate Curving space - it is the Higgs?
- Triton
- · Replies 2 ·
Graduate Why does proper time depend on choosing a rest frame?
- TheAntiRelative
- · Replies 11 ·
Undergrad Light always wants to travel in a straight line
- UrbanXrisis
- · Replies 8 ·
Graduate Why does the rubber sheet analogy fail for equal masses?
- Michael Dmitriyev
- · Replies 9 ·
Graduate Mass Transference: Can Light be Converted to Matter?
- oldunion
- · Replies 6 ·
Graduate Gravity is really curves in space time
- michael879
- · Replies 14 ·
Can Time Travel into the Past Ever Be Possible?
- lvlastermind
- · Replies 44 ·
Graduate Is space dependent on the presence of matter?
- Starship
- · Replies 11 ·
Graduate Finding the contraction formula using proper time
- robert Ihnot
- · Replies 16 ·
Graduate Photon Energy when Doppler Shifted
- smyri
- · Replies 35 ·
Graduate What is the street number of the last house passed crossing a black hole horizon?
- Zanket
- · Replies 28 ·
Graduate General Relativity and Theory of Spinors
- member 11137
- · Replies 14 ·
Graduate Can an electron's mass curve spacetime and create frame dragging?
- kalikid021
- · Replies 6 ·
Undergrad Length contraction and time dilation
- eok20
- · Replies 7 ·
Graduate Objects turning into a black hole near the speed of light?
- yeus
- · Replies 33 ·
Graduate Information needed on two wheels and chain apparent paradox in SR
- sar_sar
- · Replies 14 ·
Graduate Was there anything before the Big Bang singularity?
- oldunion
- · Replies 6 ·
Graduate Closed orbit light rays in Schwarzschild metric
- JohanL
- · Replies 2 ·
Graduate How does spacetime curvature explain gravity?
- mosfet_2005au
- · Replies 6 ·
Graduate The energy-momentum tensor and the equivalence principle
- hellfire
- · Replies 23 ·
Graduate Why is the twin paradox called a paradox if relativity explains it?
- marconism
- · Replies 15 ·
Graduate Temperature and observer velocity
- Iraides Belandria
- · Replies 8 ·
Graduate Equivalence without relativity
- Chronos
- · Replies 12 ·
Graduate What is Space? A Theory Exploration
- cAm
- · Replies 54 ·
Graduate Are special and general relativity experimentally proven?
- cj
- · Replies 16 ·
Graduate Does parallel transport around spacetime loops have physical meaning in GR?
- kleinwolf
- · Replies 16 ·
Graduate Age of the universe - absolute or relative?
- Frank3
- · Replies 6 ·
Graduate Are the laws of motion independent of time and space?
- InvariantBrian
- · Replies 27 ·
Graduate What is the Time Dilation Relationship Near a Black Hole's Event Horizon?
- Samuel A. (Sam) Cox
- · Replies 2 ·
Graduate Does the equivalence principle hold for charged particles?
- pianoplayer
- · Replies 30 ·
Undergrad Time Dilation: Gravity's Effect on Time
- penguinraider
- · Replies 5 ·
Graduate Can a New Gravity Theory Rival Einstein's Predictions?
- Crosson
- · Replies 7 ·
Graduate Why do we need both covariant and contravariant vectors?
- Baggio
- · Replies 7 ·
Graduate Does time expand with space in an expanding universe?
- ShadowKnight
- · Replies 34 ·
Graduate Can a Centrifuge Experiment Demonstrate Reciprocity in Special Relativity?
- Jeff273
- · Replies 14 ·
Graduate Components and basis transform differently
- Ratzinger
- · Replies 4 ·
Graduate Cosmological Questions and Their Degenerate Answers
- cosmoboy
- · Replies 32 ·
Undergrad How can I plot the altitude of a capsule during re-entry?
- phiska
- · Replies 2 ·
Undergrad How Long Does a Meter Stick Appear When Traveling at Light Speed?
- Aprilshowers
- · Replies 3 ·
High School Why the speed of light is so fast?
- PhysKid24
- · Replies 12 ·
Graduate Solving Ball's Shadow: Theoretical Analysis
- The Rev
- · Replies 2 ·
Graduate Geometry vs Particles: Einstein's Perspective on Gravity
- infidel
- · Replies 3 ·
Graduate How Are Wormholes Created and Can Water Hold Them Open?
- Someone502
- · Replies 6 ·
Graduate Good online report about wormholes?
- Sauron
- · Replies 7 ·
Graduate Inhomogeneous and anisotropic dust models
- hellfire
- · Replies 6 ·
Graduate Electron in Earth Orbit: Does it Emit Radiation?
- yogi
- · Replies 4 ·
Graduate Viewing the Big Bang? Answers for AstroGeek Toby
- Tobasco
- · Replies 2 ·