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 Reconciling time dilation, causality, and light speed constancy
- kenewbie
- · Replies 9 ·
Graduate What Units Should Be Used for the Left Half of the GR Equation?
- snoopies622
- · Replies 6 ·
Graduate Twin paradox if one twin accelerates away then stops
- Xeinstein
- · Replies 9 ·
Graduate Does a Photon Have a Lifespan?
- GearsofWar
- · Replies 32 ·
Undergrad Why Is Time Considered the 4th Dimension in Einstein's Theory?
- Xeinstein
- · Replies 5 ·
Graduate Can a Single Particle Move Without a Reference Point?
- Denton
- · Replies 2 ·
Graduate What Does the Curvature of Time Look Like in Our Perception?
- Xeinstein
- · Replies 4 ·
Graduate Derivative of the metric tensor
- Santiago
- · Replies 3 ·
Graduate Einstein's Derivation, why is light velocity c-v and c+v?
- Perspicacious
- · Replies 5 ·
Graduate Maxwell vs Newton: Contradictions in Electrodynamics and Mechanics
- rakeshsugirth
- · Replies 5 ·
Graduate Doppler Effect and absolute simultaneity
- bernhard.rothenstein
- · Replies 1 ·
Graduate Energy-momentum for a point particle and 4-vectors
- 1effect
- · Replies 65 ·
Graduate Two questions about the ADM formalism
- kdv
- · Replies 11 ·
Graduate Solve Absolute Simultaneity with Einstein's Procedure
- bernhard.rothenstein
- · Replies 8 ·
Graduate Where Can I Find a Review of Relativistic Thermodynamics?
- touqra
- · Replies 6 ·
Graduate Electric field from relativistic beam and past light cone charge distribution
- Rich L.
- · Replies 2 ·
Graduate FTL travel: Do you think we can do it?
- leftyguitarjo
- · Replies 9 ·
Graduate Confusion about signal latency vs true relativity
- DocZaius
- · Replies 11 ·
Graduate Space-Time Curve in Black Holes: What Does It Mean?
- Prasanna Suman
- · Replies 2 ·
Graduate Where did the integral disappear in the energy-momentum tensor definition?
- lion8172
- · Replies 1 ·
Graduate Show Lorentz invariance for Euler-Lagrange's equations- how?
- Bapelsin
- · Replies 4 ·
Graduate Why do people insist on the graviton
- Denton
- · Replies 2 ·
Undergrad Hypothesis about speed of light
- DonnieD
- · Replies 22 ·
Graduate Why is light speed constant and time slows with velocity?
- Gear300
- · Replies 5 ·
Undergrad Spacetime fabric, light and gravity, and quantum-relativity split
- Owen-
- · Replies 3 ·
Graduate Gravity, cause or effect of time dilation?
- petm1
- · Replies 9 ·
Undergrad Why Does the Speed of Light Remain Constant When Moving in an Airplane?
- sirissa
- · Replies 3 ·
Graduate Is there a relation between GCT and Lorentz invariance?
- kdv
- · Replies 2 ·
Graduate How infinite does time get by gamma
- zZhang
- · Replies 3 ·
Graduate Understanding Notation in Hawking and Ellis: V_{(c;d)} and V_{[c;d]}
- robousy
- · Replies 2 ·
Graduate A question concerning the lorentz transformation derivation
- ehj
- · Replies 21 ·
Graduate How does general relativity explain why objects fall toward Earth?
- Xeinstein
- · Replies 14 ·
Graduate How to calculate spacetime curvature from a given mass
- Kaleetos
- · Replies 3 ·
Graduate The classical aether vs. the modern vacuum
- Maxwell's Beard
- · Replies 57 ·
Graduate Apparent position and light travel time
- gonegahgah
- · Replies 77 ·
Graduate Question on Special Relativity.
- BathingGrape
- · Replies 18 ·
Interesting new take on gravitation?
- shalayka
- · Replies 4 ·
Graduate Rotating Spacetime - a question
- neopolitan
- · Replies 2 ·
Graduate Why does light have invarient speed?
- Xeinstein
- · Replies 3 ·
Graduate Why does spacetime bend around massive objects?
- Michamus
- · Replies 1 ·
Graduate Plotting space-time curvatures as curved 2D-surfaces
- TheMan112
- · Replies 9 ·
Graduate An illustration of relativity with rulers and clocks
- JesseM
- · Replies 8 ·
Graduate Massive objects moving too fast
- Coughlan
- · Replies 57 ·
Graduate Why is the time axis labeled ct instead of just t on spacetime diagrams?
- DocZaius
- · Replies 25 ·
Undergrad Gravity and the earth's geometry
- sutupidmath
- · Replies 3 ·
Graduate Finding a Textbook for General Relativity and String Theory
- Wannabeagenius
- · Replies 6 ·
Graduate Can a rod deform if pushed faster than the signal speed through it?
- Zhivago
- · Replies 1 ·
Graduate Does my spaceship accelerate forever?
- kawikdx225
- · Replies 17 ·
Graduate Is time the measurement of energy transfer, not time dilation?
- tennismike22
- · Replies 5 ·
Graduate Deriving a function from Schwarzschild metric to show singularity at r=0
- blp
- · Replies 4 ·
Graduate Is Einstein's Explanation of General Relativity Self-Contradicting?
- mitesh9
- · Replies 19 ·
Graduate Is Relativity Considered a Gauge Theory?
- Jim Kata
- · Replies 1 ·
Graduate Black hole formation and Hawking radiation with infinite coordinate time
- Oliver981
- · Replies 4 ·
Graduate Does Clock Speed Vary with Gravitational Potential Inside a Spherical Cavity?
- Xeinstein
- · Replies 13 ·
Graduate How close to light speed can you theoretically get?
- Meatbot
- · Replies 16 ·
Graduate Parallel transport approximation
- jostpuur
- · Replies 1 ·
Graduate Is Gravity Really Linked to Mass or Something More Complex?
- Denton
- · Replies 6 ·
Undergrad Does light always reach me at speed c no matter how fast I move away?
- sei6i
- · Replies 9 ·
Graduate Derivative of metric and log identity
- robousy
- · Replies 11 ·
Graduate What Two Speed Measurements Do Observers in Relative Motion Always Agree On?
- Lillyotv
- · Replies 9 ·
Graduate Near-extremal D3 brane geometry in 5D with negative cosmological constant
- Pacopag
- · Replies 4 ·
Graduate How Does Time Travel Through Wormholes Violate Causality?
- Northprairieman
- · Replies 1 ·
Graduate Why does time dilation from a light clock apply to all clocks?
- ehj
- · Replies 3 ·
Graduate Elapsed time on accelerating clock
- Point Conception
- · Replies 5 ·
Graduate Why Was the Big Bang Not a Black Hole?
- scott haig
- · Replies 14 ·
Graduate Why does relativistic momentum work out in MeV/c with kg mass?
- jk4
- · Replies 3 ·
Undergrad Information for the uninformed
- James23
- · Replies 20 ·
Undergrad Can a traveler near lightspeed communicate with Earth via laser signals?
- JikeSpingleto
- · Replies 7 ·
Graduate Adjoint of functional derivative in superspace
- HenryGomes
- · Replies 1 ·
Graduate Non-standard clock synchronization
- bernhard.rothenstein
- · Replies 10 ·
Undergrad Is the Relative Speed of Light Constant?
- jjaji
- · Replies 12 ·
Undergrad What do the clocks read when the train stops in the train experiment?
- allebone
- · Replies 50 ·
Graduate Is the Aether Truly Attached to Earth?
- hartlw
- · Replies 12 ·
Graduate Deriving the line element in homogenous isotropic space
- TheMan112
- · Replies 1 ·
Graduate Conventionality and clock symchrnization
- bernhard.rothenstein
- · Replies 4 ·
Graduate Simple problem driving me nuts :-)
- Fredrik
- · Replies 4 ·
Graduate Does a Spinning Cylinder Affect Rocket Acceleration and Energy Conservation?
- yuiop
- · Replies 27 ·
Graduate The Villain's Fate: Alive or Dead?
- Adam Lewis
- · Replies 4 ·
Undergrad What is the required energy for reaching 99.99999c velocity?
- maxwilli06
- · Replies 5 ·
Undergrad Why does the fourth dimension matter in relativity?
- _Mayday_
- · Replies 5 ·
Graduate Colliding rotating black holes
- TheMan112
- · Replies 3 ·
Graduate Can a light spot on a distant wall travel faster than light?
- ABHIdAVIATOR
- · Replies 5 ·
Graduate Learn GR: Mathematics Required for General Relativity
- darkSun
- · Replies 2 ·
Graduate Local acceleration experienced by observer
- gordonblur
- · Replies 10 ·
Undergrad Losing gravitational potentional energy
- Tachyonie
- · Replies 5 ·
Graduate How can I learn relativity's validity if I can't question it?
- Joanna Dark
- · Replies 46 ·
Graduate Angular momentum and quantum spin
- touqra
- · Replies 1 ·
Graduate Can relativistic abberation be observed in quasar jets?
- W.RonG
- · Replies 5 ·
Graduate Light moves at C from all frames of references?
- Bigman
- · Replies 9 ·
Graduate Energy-mom tensor of charged dust (homogeneous and isotropic)
- smallphi
- · Replies 1 ·
Graduate Consensus about Van Flandern's ideas on speed of gravity?
- hkyriazi
- · Replies 53 ·
Graduate Proper time of accelerated clocks
- yuiop
- · Replies 18 ·
Graduate Question on traveling spaceships
- SteyrerBrain
- · Replies 19 ·
Graduate Emission/Absorption and electron orbits
- fourdoughnut
- · Replies 14 ·
Undergrad Speed of Light and Flash Light
- uprootedferre
- · Replies 2 ·
Graduate Deriving the Einstein ring radius formula with light bending
- adwbizi1
- · Replies 1 ·
Graduate Radial geodesic distance with Schwarzschild's solution
- TheMan112
- · Replies 4 ·
Graduate I have 2 questions about relativity
- hrishikesh
- · Replies 6 ·
Graduate Reverse-tracing Einstein's field equation
- TheMan112
- · Replies 11 ·
Graduate How Large Must a Spark Chamber Be to Qualify as an Inertial Frame?
- Ed Quanta
- · Replies 1 ·