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
High School Is the minimal time dilation principle correct for teaching GR?
- mishima
- · Replies 4 ·
Graduate Does Potential Energy Have Mass, Even When Negative and Non-Unique?
- ralqs
- · Replies 11 ·
Graduate Two expression for relativistic acceleration
- Pi-Bond
- · Replies 8 ·
Undergrad Is the concept of a perpetual motion machine feasible in the realm of physics?
- guss
- · Replies 104 ·
Graduate Light - What exactly is happening?
- cowmoo32
- · Replies 150 ·
SR/GR FAQs: Check out the Latest List
- Dale
- · Replies 2 ·
Graduate Acceleration is perpendicular to velocity
- Naty1
- · Replies 11 ·
Graduate Speed of light hypothetical question
- anti666
- · Replies 14 ·
Graduate Light bouncing in a spaceship: inertial coupling and distance measurements
- DonB
- · Replies 25 ·
Graduate Time and physicality of dimensions
- Octavianus
- · Replies 4 ·
Graduate If moving clocks run slower, which clock is moving?
- Master J
- · Replies 25 ·
Graduate When is something covariant or contravariant?
- omega_minus
- · Replies 7 ·
Graduate The Speed of Light, Gravity, and Why it all is what it is.
- Phyzwizz
- · Replies 55 ·
High School What's the Delay with a Wire to a Planet 1 Light Year Away?
- IssacBinary
- · Replies 4 ·
High School Why Does an Object Shrink When Traveling Close to Light Speed
- bodhi
- · Replies 4 ·
Graduate Is Gravity a Particle or a Spacetime Phenomenon?
- YoungDreamer
- · Replies 1 ·
Undergrad Sundial & Relativity: Inertial Frame Differences?
- mishima
- · Replies 9 ·
Graduate Can Standing Still Make Time Pass Faster Than the Speed of Light?
- abbott287
- · Replies 31 ·
Undergrad Humans travelling at light speed?
- mibaokula
- · Replies 48 ·
Graduate Black hole surface gravity question
- PeterDonis
- · Replies 10 ·
Graduate What Happens to Time and Light in Physics?
- Cbray
- · Replies 20 ·
Graduate Do Closed Timelike Curves Exist in Reality or Nature?
- byron178
- · Replies 12 ·
Graduate How Does Gravity Affect Flywheel Behavior in General Relativity?
- yuiop
- · Replies 15 ·
Graduate Does moving observer see stationary observer's time speed up?
- Default
- · Replies 13 ·
Graduate How to define the dimension of a singularity in general relativity
- bcrowell
- · Replies 8 ·
Graduate Can you create a black hole from light? Also, Whiteholes vs. Blackholes
- bernsten69
- · Replies 3 ·
Graduate Gravitational effects on particles orbit in a box
- FunkyDwarf
- · Replies 3 ·
Graduate Does the Doppler effect for light involve compression of spacetime?
- ATdisplays
- · Replies 14 ·
Graduate What is the Stress-Energy Tensor
- OniLink++
- · Replies 7 ·
Graduate Is Gravity a Result of Mass Attracting Quanta of Mass?
- Goolds
- · Replies 34 ·
Graduate Penrose diagrams, reference request.
- martinbn
- · Replies 2 ·
Undergrad What Happens to Matter Inside a Black Hole?
- Shade Tree
- · Replies 19 ·
Graduate Does increasing velocity shrink matter?
- Pocketwatch2
- · Replies 10 ·
Graduate Thought experiment on the nature of light
- rede96
- · Replies 2 ·
Graduate De Sitter's double star experiment showing light speed independence from source velocity
- haitham1984
- · Replies 7 ·
Undergrad 2 protons have less mass than combined
- Cbray
- · Replies 3 ·
Graduate Effect of Gravity Well on Muzzle Velocity of Gun
- yuiop
- · Replies 2 ·
Graduate Global GR Theorems without Energy Conditions?
- PAllen
- · Replies 2 ·
Graduate Lagrangian for the General Relativity
- MManuel Abad
- · Replies 3 ·
Graduate General Lorentz Matrix in Terms of Rapidities
- Passionflower
- · Replies 12 ·
Graduate What does a video recording show when viewing Earth at 99% light speed?
- lovenugget
- · Replies 9 ·
High School Are black holes theoretical or real?
- LeeJeffries
- · Replies 13 ·
Graduate Does Causality Have Meaning When Spacetime Disappears?
- ndung200790
- · Replies 1 ·
Graduate Alcubierre Drive vs the Hubble Constant
- dan_r
- · Replies 4 ·
Graduate Imagine a solid, non-conducting cylinder at rest in IRF K, with a
- GRDixon
- · Replies 12 ·
Graduate Lorentz transformation for non-inertial frame
- lovetruth
- · Replies 17 ·
Graduate Why can light travel at the speed c?
- mibaokula
- · Replies 31 ·
Graduate Non singular black hole solutions
- evanallmighty
- · Replies 31 ·
Graduate Total energy at zero rest mass
- espen180
- · Replies 15 ·
Graduate How Does Space-Time Fabric Elasticity Influence Time Flow?
- nouveau_riche
- · Replies 3 ·
Graduate How Do Moving Charges Behave Differently in Different Reference Frames?
- lovetruth
- · Replies 59 ·
Undergrad The paradox, is basically a theory about time travel.
- qsefthuko66
- · Replies 31 ·
Graduate Can general relativity be constructed with differential forms?
- Phrak
- · Replies 10 ·
Graduate Computing Lagrangian for Light Propagation in Spacetime
- atoasttoall
- · Replies 1 ·
Undergrad So if space/time is a plain
- Twigsoffury
- · Replies 4 ·
Graduate Why do both cars measure light at 186,000 miles per second?
- abbott287
- · Replies 4 ·
Graduate Does relativistic mass increase gravitational pull?
- TWest
- · Replies 59 ·
Graduate Why do relativistic transformations give a non-c light speed?
- lovetruth
- · Replies 11 ·
Undergrad Why Does Light Lose Energy with Universe Expansion?
- sancharsharma
- · Replies 4 ·
Graduate Can time run differently for the same observer at the speed of light?
- Rishavutkarsh
- · Replies 7 ·
Graduate Light travel time vs actual distance at near light speed
- spellwords
- · Replies 19 ·
Graduate Radial tidal forces and tidal forces on moving objects redux
- pervect
- · Replies 0 ·
Graduate Relativistic Momentum to Kinetic Energy Conversion
- mayeraus41
- · Replies 7 ·
Undergrad E=mc2 How did Einstein get to this equation?
- Zac Einstein
- · Replies 5 ·
Undergrad What is general relativity?
- Allojubrious
- · Replies 9 ·
Graduate Why is the speed of light absolute in all reference frames?
- PhizzicsPhan
- · Replies 30 ·
High School Einstein's Explanation of Mercury's Precession
- stevmg
- · Replies 7 ·
Graduate Could Time Travel Be Possible By Studying Particle Motion in the CERN Collider?
- ananthan345
- · Replies 9 ·
Graduate Relativity and Probability Waves
- PaulMurphy
- · Replies 1 ·
Graduate What is the maximum speed one can travel near a stellar mass black hole?
- mat1101
- · Replies 19 ·
Graduate Relativistic Ohms Law: Modeling 1D Hot Electron Beam in Plasma
- hunt_mat
- · Replies 2 ·
Graduate How exactly does mass curve space?
- alemsalem
- · Replies 3 ·
Graduate When did Landau derive the Raychaudhuri equation?
- victorneto
- · Replies 2 ·
Graduate Why Does Redshift Occur?; Other Factors That Cause Elongation Of Wavelength?
- ecneicS
- · Replies 1 ·
Graduate Superluminal events which do not transmit information or energy
- touqra
- · Replies 5 ·
Graduate Can Superluminal Speed Be Incorporated into Lorentz Transformations?
- quantizedzeus
- · Replies 1 ·
Graduate Mechanism for Alcubierre engine?
- jerich1000
- · Replies 11 ·
Undergrad Magnetic field from Van De Graff
- arydberg
- · Replies 9 ·
Graduate Relativistic effects on a body rotating at near c
- dan_r
- · Replies 6 ·
Graduate Relativistic Problem: Mr. C's Observation
- khamaar
- · Replies 3 ·
Graduate Proton falling into a Black hole?
- cragar
- · Replies 10 ·
Graduate Calculating World Line for Least Proper Time: An Easy Question on Relativity
- teddd
- · Replies 3 ·
Graduate Computing K^μK_μ for the Killing vector in Kerr metric
- edwiddy
- · Replies 7 ·
Undergrad Understanding Mass and Energy in Special Relativity
- Zac Einstein
- · Replies 8 ·
Graduate Problems with a complex stress-energy tensor
- Time Suspect
- · Replies 3 ·
Undergrad Can Time Be Infinite?
- 1MileCrash
- · Replies 20 ·
Graduate Do Photons Influence Gravitational Fields?
- AntonL
- · Replies 19 ·
Graduate How Is The Relativity Of Simultaneity Consistent With Physics And Relativity
- hprog
- · Replies 47 ·
Graduate What is the condition for a circular orbit?
- vaibhavtewari
- · Replies 2 ·
Graduate Can a metric be both static and expanding depending on coordinates?
- TrickyDicky
- · Replies 41 ·
Graduate If time slows down as velocity approaches C
- ecneicS
- · Replies 15 ·
Undergrad How do gravity waves interact with mass and electromagnetism?
- MegaDeth
- · Replies 10 ·
Graduate Is the polarization of light relative?
- Nirgal
- · Replies 4 ·
Graduate Rotation of coordinate system in minkowsky spacetime
- teddd
- · Replies 7 ·
Graduate Controlled experiment with time.
- eagerbeaver
- · Replies 56 ·
Graduate Maxwell's equations and relativity
- Zac Einstein
- · Replies 10 ·
Undergrad What tests have been done to confirm the speed of gravity?
- Tokage
- · Replies 15 ·
Graduate Gravity: An Effect or a Force?
- Curious4Ever
- · Replies 1 ·
High School Where did the gravity come from?
- Zac Einstein
- · Replies 6 ·
Undergrad Why Can We Feel the Gravitational Field of a Black Hole?
- briduende
- · Replies 48 ·