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 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 ·
Graduate Time dilation as seen by different observers
- dougy
- · Replies 16 ·
Graduate A thought experiment general relativity
- Shahar
- · Replies 25 ·
Graduate Are There Really 4 Isotropic Axes of Spacetime at Light Speed?
- brianhurren
- · Replies 3 ·
Graduate How Does a Photon Get Absorbed at t=0?
- Dead RAM
- · Replies 5 ·
Graduate What Happens to the Space Between Relativistically Moving Spaceships?
- intervoxel
- · Replies 2 ·
Graduate Traveling at Near Speed of Light - Questions Answered
- derek10
- · Replies 8 ·
Graduate Bending of Light: Newton vs Einstein
- dd129495
- · Replies 13 ·
Graduate Rest Energy of Electrons in Particle Accelerators: Zero or Not?
- Mizies
- · Replies 6 ·
Graduate Compacting Matter in a Black Hole Singularity: Is It Pure Entropy?
- !Jon Snow!
- · Replies 2 ·
Graduate Euler-Lagrange Equation of $$ds^2=-f(x)dt^2+g(x)dx^2+2l(x)dxdt$$
- PhyAmateur
- · Replies 2 ·
Graduate Modifications in General Relativity
- aditya ver.2.0
- · Replies 8 ·
Graduate Can you topple a spinning top moving at near-light speed?
- nitsuj
- · Replies 10 ·
Graduate Does every object experience some gravitational acceleration?
- DiracPool
- · Replies 1 ·
Graduate Inverse curvature of space-time
- ScientificMind
- · Replies 21 ·
Undergrad Math & Relativity: Understand Einstein's Theories
- CosmicCube
- · Replies 5 ·
Graduate Does the passage of time slow as the universe cools?
- Paul Howard A
- · Replies 7 ·
Graduate Lie Algebra of Lorentz Group: Weird Notation?
- Theage
- · Replies 3 ·
Graduate Why is a photon's four-momentum a null vector?
- smk222
- · Replies 1 ·
Graduate General Theory of Relativity Question
- DREAMWALKER
- · Replies 30 ·
Graduate Converting momentum in MeV/c to energy units
- goodphy
- · Replies 4 ·
Graduate Ball Thrown Up Follows Curvature of Spacetime
- rajeshmarndi
- · Replies 4 ·
Graduate Hawking Radiation from All Gravitational Sources?
- bcrelling
- · Replies 3 ·
Undergrad Length Contraction in Special Relativity
- ubergewehr273
- · Replies 11 ·
Graduate Rest Energy of Electron: E=m(0)*c^2=0.511MeV
- gentsagree
- · Replies 2 ·
Graduate Do atmospheric muons accelerate?
- nitsuj
- · Replies 34 ·
Graduate Why must the event horizon be a null surface?
- center o bass
- · Replies 1 ·
Graduate High Energy Electron Greetings: Creation of Extra Particles?
- Mizies
- · Replies 3 ·
Graduate Relativistic kinetic energy derivation (from Work expended)
- freddie_mclair
- · Replies 3 ·
Graduate Understanding Light's Motion in a Moving Clock
- member 529879
- · Replies 13 ·
Undergrad Time dilation - effect on clock or 'time' itself?
- henry555
- · Replies 10 ·
Graduate Twin Paradox: Will Car A Age Slower?
- bcrelling
- · Replies 4 ·
Graduate Null geodesics of the FRW metric
- center o bass
- · Replies 2 ·
Graduate Does the weight of a relativistic mass change when measured on a moving scale?
- MiladP
- · Replies 54 ·
Graduate Black Hole Penrose Process: Understanding Negative Energy Condition
- binbagsss
- · Replies 3 ·
Graduate What does 10% accuracy mean in the Pound-Rebka experiment?
- exmarine
- · Replies 8 ·
Graduate Observable universe as a black hole
- bcrelling
- · Replies 6 ·
Undergrad EMF Generated When Magnet Moves Linearly Across Its Field
- Harsha Kumar
- · Replies 3 ·
Graduate Is Classical Mechanics Wrong? A Horrible Proof of Its Inadequacy
- Albeaver
- · Replies 12 ·
Graduate What Happens to Acceleration and Spatial Distances Near the Speed of Light?
- jerromyjon
- · Replies 37 ·
Graduate Static + Hypersurface Orthogonality
- latentcorpse
- · Replies 7 ·
Graduate Photon pressure within a black hole
- bcrelling
- · Replies 5 ·
Graduate Where Does the Traveling Twin Lose Time in the Twin Paradox?
- CKH
- · Replies 67 ·
Graduate Relativity of Simultaneity and the Perception of Time in Motion
- member 529879
- · Replies 2 ·
Graduate Does a moving, rotating globe's gravitational field still point toward its center?
- James_Harford
- · Replies 15 ·
Graduate Red Shift Q: Where Does Lost Energy Go?
- Gary Boothe
- · Replies 8 ·
Undergrad Which formula applies to relativistic Doppler shift?
- camel-man
- · Replies 2 ·
Graduate Does Relativity of Simultaneity Imply Movement Before Action?
- member 529879
- · Replies 2 ·
Graduate Light Experiments at IAP, Darmstadt: Einstein's Speculations
- ConformalGrpOp
- · Replies 2 ·
Graduate Why compare gravity to other forces if it's spacetime curvature
- rajeshmarndi
- · Replies 19 ·
Graduate How Does Time Dilation and Length Contraction Work in Special Relativity?
- BrotherTheo
- · Replies 6 ·
View Einstein's Papers for Free on Princeton University Website
- Histspec
- · Replies 2 ·
Graduate FRW metric transformation between physical and comoving coordinates
- Einj
- · Replies 14 ·
Graduate Extended Extreme Multiple Reissner Nordstrom Black holes
- keithdow
- · Replies 2 ·
Graduate What does it mean when a light curve is zero in light cone coordinates?
- JonnyMaddox
- · Replies 1 ·
Graduate How to explain the curvature of space-time to students
- supernova88
- · Replies 5 ·
Graduate Analysis of the physics in Interstellar
- phi1123
- · Replies 4 ·
Graduate Does gravity field really exist?
- ABW
- · Replies 35 ·
Graduate Understanding Microwaves: Their Function and Effects on Food in Space
- Hati
- · Replies 3 ·
Graduate Does equal rest mass always equal equal energy?
- Adam Rifai
- · Replies 2 ·
Graduate Definition of gravity according to GR
- aditya ver.2.0
- · Replies 2 ·
High School Can there be an area with no gravity?
- Pjpic
- · Replies 7 ·
Graduate Geometry of Time Dilation
- mcjosep
- · Replies 4 ·
Graduate Does the Twin Paradox Still Apply with Identical Acceleration Readings?
- Fantasist
- · Replies 22 ·
Graduate Coordinate values of G can vary from standard value
- Jonathan Scott
- · Replies 25 ·
Graduate Could Laser Beam Shifting Enable Faster-Than-Light Communication?
- Gaz1982
- · Replies 2 ·
Graduate Determining Metric of Space-Time (H.P. Robertson 1949)
- ConformalGrpOp
- · Replies 3 ·
Graduate How is the Faraday Tensor related to the 4-potential?
- unscientific
- · Replies 8 ·
Graduate Relativistic Effects On International Space Station (ISS)
- Gary Boothe
- · Replies 2 ·
High School Einstein says objects do not fall to the Earth?
- inertiaforce
- · Replies 127 ·
Graduate Does wormhole create gravitational wave?
- Pion
- · Replies 2 ·
Undergrad Can time dilation cause confusion in the twin paradox?
- lrubin28
- · Replies 14 ·
Graduate Explanation of the following field equation
- aditya ver.2.0
- · Replies 11 ·
Graduate How did Einstein derive the meaning of Schwarzchild's metric
- space-time
- · Replies 10 ·
Graduate Israel Wilson Perjes Metric: Tetrad Formalism Reference
- PhyAmateur
- · Replies 5 ·
Undergrad Why does time slow down for a moving body relative to a stationary reference frame?
- ubergewehr273
- · Replies 4 ·
Graduate What Are the Speed and Energy Density Limits of Dark Matter?
- vin300
- · Replies 2 ·
Graduate Were Hawking Radiation & Singularity Theorem Controversial in 1965?
- bcrowell
- · Replies 2 ·
Graduate Einstein's Regret: Penrose Asserts on Relativity
- gamow99
- · Replies 4 ·
Graduate Does a black hole evaporate before a falling observer crosses the horizon?
- Zack Davis
- · Replies 2 ·
Graduate Tetrads, frames, connections and the Einstein-Rosen metric
- Breo
- · Replies 43 ·
Graduate Confusion about parallel transport
- emily1986
- · Replies 36 ·
Graduate Radiation recoil in the rest frame vs boosted frame
- universal_101
- · Replies 17 ·
Graduate Einsteins field equations us what type of index notation?
- oddjobmj
- · Replies 4 ·
Graduate Why do carbon nanotube rods widen in the spinning satellite FTL thought experiment?
- ubergewehr273
- · Replies 2 ·
Undergrad Does moving matter exert greater gravitational pull?
- neuralnova
- · Replies 5 ·
Graduate Electromagnetic tensor and restricted Lorentz group
- TrickyDicky
- · Replies 3 ·
Graduate Can Einstein field equations include fermionic fields directly?
- ShayanJ
- · Replies 8 ·
Graduate Can Time Be Reversed by Traveling Faster Than Light?
- ubergewehr273
- · Replies 7 ·
Graduate Why are wormholes drawn as tunnels with length?
- Breo
- · Replies 3 ·
Graduate Relativity: Can a Spaceship Become a Black Hole?
- Zack Davis
- · Replies 4 ·
Graduate Why is ω^α_β = g^αμω_μβ in equation 15?
- VVS
- · Replies 1 ·
Graduate Forces on High Velocity Object - Newtonian Formula
- johann1301
- · Replies 4 ·
Graduate Dark Energy: Is Stretching Space-Time the Answer?
- J7H18
- · Replies 5 ·
Graduate Have gravitational waves been detected and measured?
- tonyxon22
- · Replies 15 ·
Graduate What is the Unique Metric Tensor in this Line Element?
- Breo
- · Replies 46 ·
Graduate Why does spacetime curvature cause tides on the far side of Earth?
- Leonardo Muzzi
- · Replies 4 ·