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
Undergrad Simultaneity Paradox in Space: What's Going On?
- Arkalius
- · Replies 8 ·
Undergrad Is the Christoffel symbol orthogonal to the four-velocity?
- Sonderval
- · Replies 15 ·
Graduate Perihelion Precession in GR with Robertson Expansion
- Sonderval
- · Replies 4 ·
High School Do gravity and acceleration alter the speed of light?
- Ivan Bevanda E
- · Replies 21 ·
Undergrad Relativity and Eternalism: Proving the Possibility of 'Seeing the Future
- i_hate_math
- · Replies 8 ·
High School Why doesn't a disc lose mass when playing video according to E=mc²?
- parshyaa
- · Replies 2 ·
Graduate Bell's spaceship paradox: what happens after the rod breaks?
- Philip Wood
- · Replies 18 ·
High School Is it possible to reach the singularity?
- ExecNight
- · Replies 20 ·
Undergrad Thought experiment- Dropping a rope into a Black hole
- YZEDY1one
- · Replies 17 ·
Undergrad Why doesn't the ship observer see Earth's time slow down?
- EspressoDan
- · Replies 4 ·
Undergrad The name of the 3+1 metric where time is normal to space?
- gnnmartin
- · Replies 5 ·
Undergrad What counts as matter in the stress-energy tensor?
- davidge
- · Replies 19 ·
High School Effect of Varying Distance on Radio Waves
- RAMII19780529
- · Replies 11 ·
Undergrad How Much Thrust is Needed to Hover Above a Black Hole?
- greswd
- · Replies 28 ·
Undergrad What makes special relativity incompatible with Newtonian gravity?
- Peter Martin
- · Replies 12 ·
Undergrad Relativity Paradox w/ Charged Spheres
- Xynon
- · Replies 6 ·
Undergrad Does spacetime curvature cause stress-energy, or does stress-energy cause curvature?
- MattRob
- · Replies 6 ·
Undergrad Can gravitational waves knock Earth out of its orbit?
- Abhinay Soanker
- · Replies 1 ·
High School WSU Shows Negative Mass Exists: Implications for Faster-Than-Light Travel?
- MattRob
- · Replies 2 ·
Undergrad Time dilation in circular motion: what do A and B observe?
- Guilherme Mesquita
- · Replies 8 ·
Undergrad What Is the Lie Algebra of the Lorentz Group?
- Silviu
- · Replies 7 ·
High School Error in Einstein's Biography on Twin Paradox?
- Vampke
- · Replies 3 ·
High School How is that light from the sun takes about eight minutes to reach us
- sunney
- · Replies 39 ·
Undergrad Understanding Lorentz Transformation on Scalar Fields
- Silviu
- · Replies 9 ·
Graduate Asymptotically Anti de-Sitter Spacetimes
- spaghetti3451
- · Replies 2 ·
High School Why does light move at the speed it does
- RobC
- · Replies 66 ·
High School Time dilation of an orbiting ship
- Buckethead
- · Replies 28 ·
High School Can acceleration cause absolute time dilation rather than relative?
- Buckethead
- · Replies 19 ·
Undergrad Does Traveling Through a Wormhole Affect Time Dilation?
- sleeperservice
- · Replies 10 ·
Undergrad Proving the Wedge Product of 2 One-Forms is a 2-Form
- Silviu
- · Replies 3 ·
High School Does Light Speed Affect Mass of Surrounding Objects?
- hsdrop
- · Replies 5 ·
High School Space Dilation Interaction Between Two Masses
- MistySaa
- · Replies 20 ·
Undergrad Are vectors at a point p the same as the tangent space T_p?
- Silviu
- · Replies 10 ·
Undergrad Two Clocks Orbiting a Non-Rotating Planet: Questions Answered
- Bob Walance
- · Replies 5 ·
Undergrad Transform Bases for 4-Vectors in Ref. Frames
- Silviu
- · Replies 1 ·
High School Does light degrade as it travels through space?
- john-of-the-divine
- · Replies 102 ·
Undergrad Time: A Human Way of Measuring Change?
- davidge
- · Replies 7 ·
Undergrad Transformation of Matter into Black Holes
- greswd
- · Replies 21 ·
Undergrad Expansion of Plane of Projection: Terrel & Penrose
- Tahmeed
- · Replies 2 ·
Undergrad Acceleration towards c without a reference frame and changes
- infector
- · Replies 36 ·
Graduate Stress tensor in 3D Anti-De Sitter Space
- Pogags
- · Replies 9 ·
High School Does Distance Contraction Cause Time Dilation?
- Point Conception
- · Replies 15 ·
High School "The search for Relativity Violations"
- oquen
- · Replies 7 ·
High School Numerically Solving GRT Problems - Textbook/Article Recommendation
- exmarine
- · Replies 4 ·
High School How can space expand faster than light if nothing exceeds the speed limit?
- Sullivan Stockwell
- · Replies 3 ·
Undergrad Derive Relativistic Beaming Equation: Learn Physics Easily
- Tahmeed
- · Replies 1 ·
Undergrad Clocks ON a rotating disk: What happens?
- JulianMau
- · Replies 6 ·
Undergrad Einstein Field Equations: PDEs or ODEs? - Thomas
- Thomas Moore
- · Replies 1 ·
High School Why is the time dilation equation to the power -1/2?
- AishaGirl
- · Replies 3 ·
Graduate Eikonal approximation path integral solution in gravitational lensing
- needved
- · Replies 1 ·
High School Can sensors prove lightning strikes A and B happen simultaneously?
- Sullivan Stockwell
- · Replies 10 ·
Undergrad Object Moving Faster Than Light?
- swampwiz
- · Replies 4 ·
Graduate Acceleration of a Satellite in General Relativity
- Matter_Matters
- · Replies 4 ·
Undergrad Understand Tensors: Difference from Matrices
- Silviu
- · Replies 3 ·
Undergrad Why doesn't the Lorentz boost satisfy the metric transformation rule?
- Silviu
- · Replies 1 ·
Undergrad How does mass curve space-time?
- Martin Sallberg
- · Replies 6 ·
High School How does gravity bend spacetime if spacetime isn't a physical surface?
- Navid Eghbali9
- · Replies 3 ·
High School Transmitting information using gravitational waves
- Agliomby
- · Replies 66 ·
Undergrad Reference Frame Usage in General Relativity
- leo.
- · Replies 4 ·
Undergrad Carol Rovelli on the Notion of "Now" - Is He Right or Wrong?
- windy miller
- · Replies 11 ·
High School Is it that hard to do Relativity in accelerating frames?
- davidge
- · Replies 33 ·
High School Can Phonon Excitations in BECs Revolutionize Gravitational Wave Detection?
- Auto-Didact
- · Replies 3 ·
Undergrad Ignoring boundary term in the action
- davidge
- · Replies 32 ·
Undergrad The Electric field of a moving charge according to Purcell
- particlezoo
- · Replies 45 ·
Graduate How do magnetic fields curve spacetime?
- vibe3
- · Replies 9 ·
Graduate Signs in the definition of anti de Sitter spacetimes
- spaghetti3451
- · Replies 1 ·
Graduate Is spacetime orientation a convention?
- RockyMarciano
- · Replies 31 ·
Undergrad Is the Notation for Coordinate Transformation in Relativity Problematic?
- davidge
- · Replies 8 ·
Undergrad Solving Confusing Text in Wiki Friedmann Article
- Buzz Bloom
- · Replies 4 ·
Undergrad Why does light leaving at t=2 seem to experience time in Minkowski diagrams?
- JohnnyGui
- · Replies 10 ·
High School Could gravitational waves be used for interstellar travel?
- hsdrop
- · Replies 6 ·
Undergrad Can Warping Spacetime Create a "Warp Bubble" in GR?
- dykuma
- · Replies 1 ·
High School How can you tell if a spinning gyroscope is rotating without external references?
- hsdrop
- · Replies 3 ·
Undergrad In gravitational assistance, does the mass matter?
- Rodrigo Olivera
- · Replies 10 ·
Graduate Proving existence and uniqueness of parallel transport from a derivative operator
- pervect
- · Replies 2 ·
Graduate Is Non-Zero Metric Determinant Enough for a Global Coordinate System?
- spaghetti3451
- · Replies 9 ·
Undergrad Gravitational time dilation near Earth
- DanMP
- · Replies 37 ·
Undergrad Relativistic velocity scenario
- calinvass
- · Replies 11 ·
High School Okun argument against relativistic mass - pedagogy
- houlahound
- · Replies 8 ·
Undergrad Prediction of GR for the gravitational pull
- ftr
- · Replies 11 ·
Undergrad Energy-Momentum Tensor: Validity in Relativity?
- davidge
- · Replies 8 ·
High School Gravity of hollow sphere vs. solid sphere of same mass
- Andy SV
- · Replies 5 ·
Undergrad Understanding parallel transfer
- joneall
- · Replies 36 ·
High School Can sound distort the fabric of space?
- John Clement Husain
- · Replies 31 ·
High School Metric tensor of a perfect fluid in its rest frame
- rolling stone
- · Replies 13 ·
Undergrad Multivariable Calculus Project: Spacetime/Black Holes
- pmrotman
- · Replies 6 ·
Undergrad Rindler coordinates in Minkowski spacetime
- spaghetti3451
- · Replies 4 ·
High School Is a "meter" observer dependent?
- ajay.05
- · Replies 12 ·
High School Why does a moving clock with longer ticks show less elapsed time?
- Troodon Roar
- · Replies 21 ·
Graduate ADM mass of a spacetime and mass of the associated matter
- spaghetti3451
- · Replies 6 ·
Undergrad How much topology is needed to study relativity mathematically?
- davidge
- · Replies 19 ·
Undergrad Levi-Civita symbol in Minkowski Space
- illuminates
- · Replies 14 ·
High School Does length contraction affect the distance an object travels?
- sqljunkey
- · Replies 6 ·
Graduate Defining the surface gravity of a black hole
- spaghetti3451
- · Replies 12 ·
Undergrad Relativistic Energy Equations: When to Use Each
- Kara386
- · Replies 5 ·
High School Does negative mass affect spacetime and gravity like positive mass?
- nitsuj
- · Replies 1 ·
High School Lorentz Transformation direction of motion
- sqljunkey
- · Replies 8 ·
Undergrad Why is time dilation not symmetric for satellites and Earth?
- Neutrinos02
- · Replies 15 ·
Undergrad What is the velocity of light in uniformly rotating frame?
- pallab
- · Replies 9 ·
High School Is time dilation in uniform motion real or just perspective?
- Rob-NYC
- · Replies 30 ·