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 Light Exceeds Its Own Speed Limit?
- Euclid Areti
- · Replies 7 ·
Undergrad Special relativity and the speed of light constant
- TimeRip496
- · Replies 24 ·
Graduate Does light bending around an object affect time in that region?
- Keystone
- · Replies 11 ·
Undergrad If photons have no mass,why would black holes attract light?
- Murtuza Tipu
- · Replies 4 ·
Graduate Equivalence of Matter Energy and Space-Time?
- WCOLtd
- · Replies 12 ·
Graduate Is a Pseudo-Riemann Metric Intrinsic to General Relativity?
- CSnowden
- · Replies 20 ·
Graduate Deriving equation 4.8 from Steane's Relativity made relatively easy
- unscientific
- · Replies 13 ·
Undergrad What would a live video feed show from a spaceship traveling near light speed?
- Hollygrove
- · Replies 4 ·
Graduate Could micro black holes enable time travel via radio signals?
- John d Marano
- · Replies 4 ·
Graduate Choice of action to geodesic equations
- Mishra
- · Replies 18 ·
Graduate The Center of the Earth and Black holes and Gravity
- Firedog89
- · Replies 39 ·
Graduate EM/GR Radiation as Scattering?
- bolbteppa
- · Replies 16 ·
Graduate Direct Experimental Evidence of Lorentz Transformations
- Thecla
- · Replies 13 ·
Graduate Theoretical Extent of Redshift - How Far Can It Go?
- Wes Tausend
- · Replies 2 ·
Graduate Could Dark Matter and Dark Energy Be Illusions of Imperfect Physics?
- Gary Boothe
- · Replies 6 ·
Graduate Causality and quantum entanglement
- acegikmoqsuwy
- · Replies 15 ·
Graduate Will Light Speed Travel Affect Perception of Andromeda Galaxy's Age and Distance?
- duordi134
- · Replies 19 ·
Graduate Why does Lorentz transformation time depend on object position?
- doaaron
- · Replies 3 ·
Graduate Introductory Material for Relativistic Boltzmann Equation
- wacki
- · Replies 4 ·
Graduate Where can I find solutions to the problems in Hartle's Gravity: An Introduction?
- PeroK
- · Replies 3 ·
Graduate What Does a Rotating Mass in Kerr Metric Rotate With Respect To?
- exmarine
- · Replies 4 ·
Graduate Rindler Horizon and Lorentz contraction
- JD96
- · Replies 12 ·
Graduate What does form-invariant function mean in Weinberg's gravitation text?
- Einj
- · Replies 3 ·
Graduate What does the mass-energy of a particle tell us about its behavior?
- gamow99
- · Replies 4 ·
Graduate Ricci tensor equation on page 363 of Zee's Einstein's Gravity in a Nutshell
- Lapidus
- · Replies 1 ·
Graduate Why Do Covariant and Contravariant Vectors Use Opposite Indexing?
- TimeRip496
- · Replies 28 ·
Graduate Penrose Diagram for the Kerr Black Hole
- Clauslism
- · Replies 19 ·
Graduate Effects of relativistic mass on astronaut
- SpiderET
- · Replies 26 ·
Graduate How do tangent space basis vectors relate to measurable physical quantities?
- danieron
- · Replies 16 ·
Undergrad Gravity Waves: Frequency & Understanding Needed
- mithun pv
- · Replies 4 ·
Graduate Can we add another time axis to spacetime diagrams?
- binbots
- · Replies 5 ·
Graduate Speed of light related to mass
- Nuradh
- · Replies 13 ·
Graduate Is a Zero Frame of Reference Possible in the Universe?
- PWiz
- · Replies 18 ·
Graduate Spacetime Curvature by Mass: Gravity Impact?
- jparth
- · Replies 2 ·
Graduate Gorini vs. Jin: Superluminal Frames in 1+1 Dimensions
- bcrowell
- · Replies 2 ·
Graduate Is relativity reciprocal or directional?
- SpiderET
- · Replies 4 ·
Graduate Is it true than general relativity can be deduced from a max
- Garrulo
- · Replies 4 ·
Graduate Throwing something into a black hole
- Sonderval
- · Replies 11 ·
Graduate Does light shift frequency in an accelerating elevator?
- DiracPool
- · Replies 7 ·
Graduate Thomas precession Goldstein/Eisberg versus Taylor/Wheeler
- gjj
- · Replies 2 ·
Graduate Does relativity change the rules for time being a vector or a scalar?
- joenitwit
- · Replies 25 ·
Graduate Close to the speed of light relative to what?
- Tiago
- · Replies 27 ·
Graduate Does any rotating charged object have g-factor 2 in general relativity?
- ShayanJ
- · Replies 8 ·
Graduate Understanding Lambda Mu Nu Prime and Its Indices
- DiracPool
- · Replies 5 ·
Graduate Now plane moving to the past and future
- rajeshmarndi
- · Replies 17 ·
Undergrad Does Mass Really Change with Velocity Near the Speed of Light?
- mike232
- · Replies 3 ·
Graduate Einstein's argument for a finite universe
- dynawics
- · Replies 10 ·
Graduate Why does (Λ⁻¹)μν equal Λνμ in Lorentz transformations?
- grzz
- · Replies 2 ·
Graduate Deriving the Lorentz Transformation
- toothpaste666
- · Replies 27 ·
Graduate Learning General Relativity: Finding Examples with Numbers
- TimeRip496
- · Replies 2 ·
Graduate Practice calculations for a relativistic speed object
- Lamdbaenergy
- · Replies 10 ·
Graduate Experimental determination of the metric tensor
- nearlynothing
- · Replies 5 ·
Graduate Does the paper 1408.2804v7 actually support tachyonic neutrinos?
- mrnike992
- · Replies 1 ·
Graduate Proper mass vs Schwarzschild Mass
- Matterwave
- · Replies 6 ·
Undergrad Ball Thrown Up: Constant Speed Despite Height
- rajeshmarndi
- · Replies 3 ·
Graduate Could black holes have no singularity?
- zerospin
- · Replies 7 ·
Graduate Are force fields deformed by length contraction?
- lennon
- · Replies 28 ·
Graduate Understanding Einstein's Field Equations Solutions
- dynawics
- · Replies 1 ·
Graduate Sphere-Ellipsoid Metric Transformation at u = 0.99c
- ChrisVer
- · Replies 1 ·
Graduate Do Photons Perceive Time?
- RaptorHunter
- · Replies 4 ·
High School Light Constant: Speed, Increase, Decrease?
- starstruck
- · Replies 3 ·
Undergrad General Case of Relative Velocities
- Quarlep
- · Replies 2 ·
Graduate Is the twin paradox affected by the topology of a torus?
- tom.stoer
- · Replies 7 ·
Graduate Useful relativistic gravity equation of motion
- Jonathan Scott
- · Replies 6 ·
Graduate Do we have time because we are moving?
- Taragond
- · Replies 72 ·
Graduate Do relativistic mass and length contraction make planets spiral into the sun?
- Ndaren
- · Replies 13 ·
Graduate Einstein's organpipe example: is the anisotropy due to Doppler effect?
- Rodrigo.D.L.M.
- · Replies 1 ·
Graduate Riemann tensor and derivatives of ##g_{\mu\nu}##
- Einj
- · Replies 4 ·
Graduate Where Can I Find a Detailed Explanation of Stress-Energy Tensors in GR?
- ShayanJ
- · Replies 93 ·
Graduate How does spacetime curvature explain gravity pulling in all directions?
- Tiago
- · Replies 55 ·
Graduate Comoving Observers Concepts cosmology
- binbagsss
- · Replies 9 ·
Graduate Does ∂μφμ equal ∂0φ0 - ∂iφi for a 4-vector?
- Maybe_Memorie
- · Replies 5 ·
Graduate How does Hawking radiation occur if time stops at a black hole's event horizon?
- Abishek
- · Replies 4 ·
Undergrad Does Gravity Affect Time Dilation on a Flat, Non-Rotating Earth?
- ScientificMind
- · Replies 2 ·
Graduate Is there a difference between rest mass and invariant mass?
- T'Pau
- · Replies 11 ·
High School Finding a relativity book on time travel and tachyons
- ScienceMan
- · Replies 2 ·
Graduate Can you travel through a wormhole if a black hole isn't really a hole?
- srivatsa
- · Replies 1 ·
Graduate Twin paradox and the size of the universe
- DiracPool
- · Replies 32 ·
Graduate Light clock on Train experiment.
- DAC
- · Replies 13 ·
Undergrad Does light slow down in a gravitational field?
- Adam Rifai
- · Replies 14 ·
Graduate Proper Distance, Rest Length: What to Know
- JD96
- · Replies 3 ·
Graduate Does gravitational length contraction change Earth's diameter in special relativity?
- keinstein
- · Replies 21 ·
Graduate Is this an acceptable way to state the EP?
- nearlynothing
- · Replies 19 ·
Graduate EMrocket Engine: Does it Violate Newton's Law?
- duordi134
- · Replies 7 ·
Graduate How does a gravitational field induce EM in Kaluza-Klein theory?
- lightfire
- · Replies 2 ·
Graduate Choice of Origin of Coordinate Systems
- Fantasist
- · Replies 15 ·
Graduate Surface gravity of Kerr black hole
- Ganesh Ujwal
- · Replies 1 ·
Graduate Does Penrose's Andromeda paradox prove determinism?
- Gravity
- · Replies 9 ·
Graduate How does cosmic expansion work with gravitons in string theory?
- nuclearhead
- · Replies 2 ·
Graduate Norm of Vector Formed by Two Vectors
- PhyAmateur
- · Replies 13 ·
Graduate A question of history concerning Rindler Coordinates
- Ammah
- · Replies 7 ·
Undergrad Questions about Gravitational Waves: Answers Here
- Bassirou
- · Replies 5 ·
Graduate Will Time Dilation at 100% c Speed Result in Eternal Life?
- Adam Rifai
- · Replies 44 ·
Graduate A direct derivation of the speed transformation formula?
- Sugdub
- · Replies 23 ·
Graduate Diameter of Earth With GRT: Did Feynman Say It?
- exmarine
- · Replies 8 ·
Graduate Compare Starting w/ Ansatz vs Complete Solution
- space-time
- · Replies 3 ·
Graduate Ricci tensor of schwarzschild metric
- PhyAmateur
- · Replies 6 ·
Undergrad Why does E=mc² give zero energy for a photon with zero rest mass?
- Adam Rifai
- · Replies 10 ·
Graduate Does object lose kinetic energy due to emitting gravitational waves?
- bgfnfgh
- · Replies 14 ·
Graduate Deriving gravitational lensing from a point mass besides Fermat's principle
- ChrisVer
- · Replies 2 ·