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 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 ·
Graduate Understanding Gravitational Red Shifting with a Solar-Mass Black Hole
- Lamdbaenergy
- · Replies 1 ·
Graduate Understanding Simultaneity in Special Relativity
- Coffee_
- · Replies 6 ·
Graduate Gravitational Time Dilation: Observing Planet Life
- Ohannesy
- · Replies 2 ·
Graduate Can Something Really Be "mass less"?
- Akash Pardasani
- · Replies 8 ·
Graduate In order to build a wormhole. .
- snoopies622
- · Replies 15 ·