Special and General Relativity Forum

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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.
Graduate Does GR fail at the Planck scale?
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Graduate Electron Falling in Kerr Metric: Release of 40% Rest Energy?
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Graduate Can Photons Exceed the Speed of Light in a Gravitational Field?
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Graduate Conservation of angular momentum in GR
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Graduate Einstein's Theory of Relativity & Time: Questions Answered
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Undergrad Anyone here play Portal? Portal + Relativity question
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Graduate New Theory of Spacetime: Is Time the 4th Dimension?
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Graduate Photon gas as medium for electromagnetic propagation
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Graduate How can Block Holes form in finite time?
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Undergrad Help with special relativity (frames of reference)
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Graduate Faster than the Speed of Light
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Graduate Terminology for Doppler shifts
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Graduate Question about C and Relativity
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Graduate Is there a reference frame where our entire life happens simultaneously?
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Graduate A thought experiment for surpassing the speed of light
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Graduate Classical Field Theory without Force
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Graduate Why is the Speed of Light Constant in Time Dilation?
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Graduate Testability of Torsion in Teleparallel Gravity - V.C. de Andrade et al
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Graduate Space-Time Distortion: Matterless Vacuums in Space
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Graduate Deflection angles of photons passing by black holes
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Graduate Equations for length contraction
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Undergrad Deriving the speed of light from the Pythagorean Theorem
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Graduate Constancy of the speed of light.
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Graduate Is (our) future already exists, according to relativity?
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Graduate How does blackhole event horizon grow?
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Graduate Straight Line Case. My paradox. Sorry if I rewrite and start a new post.
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Graduate What Do Seconds Mean During the Big Bang?
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Graduate Why Does the Twin Paradox Not Invalidate the Theory of Relativity?
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Graduate The Shape of the Universe, and General Relativity
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Graduate Why is the Andromeda Paradox flawed according to Penrose's book?
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Graduate Can We See Andromeda in Real-Time Using a Near-Light Speed Telescope?
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Graduate Gravity = warping of spacetime (doesn't make sense)
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Graduate Thought Expirement, Tethered Spacecraft travelling near light speed
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Graduate How to measure speed of light?
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Where can I find Survey of gravitational radiation theory F.A.E PIRANI
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Graduate Twin Paradox (thorough explanation needed)
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Undergrad Relativity Breakdown: Explained for Non-Scientists
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Are Black Holes Truly Fiction? Examining the Evidence
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Graduate Constant acceleration approach? =/
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Graduate TIme Dilation & Quantum Entanglement Question
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Graduate Space-time geometry in the absence of matter
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Graduate Big bang in Robertson - Walker space - time
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Graduate Gravitational waves by analogy with Maxwell's equations
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Graduate Do you have to travel away from the observer for time to slow down?
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Graduate What If Lorentz Invariance Violation Were Detected?
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Graduate Understanding Reduced Mass and its Role in Classical Mechanics
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Graduate Doubt about gravitational waves
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Graduate Relativity and the Heisenberg Ontology
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Graduate Q: if you travel closer to c, will you see length(distance) contraction
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Graduate Rietdijk-Putnam Argument: Free Will, Relativity & The Andromeda Paradox
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Graduate Distance between two points in spacetime
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Graduate Energy Approximation for Small Velocity - Schutz's "A First Course in GR
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Graduate Proving Lagrangian EOM with Non-minimal Coupling
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Graduate Equations of motion por a free particle in curved spacetime
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Graduate Contravariant metric components
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Undergrad Relativistic Space Travel: Fact or Fiction?
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Undergrad What is the kinetic energy of an object traveling at the speed of light?
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Graduate Why is the universe's expansion accelerating despite gravitational forces?
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Undergrad Speed of light not a legitamate factor in relation to mass
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Graduate Understanding the Fall into a Black Hole: A Scientific Analysis
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Undergrad When people talk about the current size of the observable universe
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Graduate Discovering Co-frame Basis Vectors for General Einstein Metric
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Graduate Conservation of Energy Down The Drain?
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Graduate What would be the physical consequence of a non-metric connection?
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Graduate Geodesic Motion for the Gödel Space-time
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Graduate Einstein's Theory - Is Moving Away at Speed 'c' Constant Time?
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Graduate Max Occupation of Spacetime: Lorentz-Fitzgerald Equation
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Graduate Do Twins Age Differently in Space Depending on Their Travel Path?
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Undergrad Why is there a universal speed limit, c, and why is it what it is?
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Graduate General Tensor contraction: Trace of Energy-Momentum Tensor (Einstein metric)
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Graduate Does Absolute Zero Affect Aging Like Twin Theory?
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Graduate The End of the Universe in an Instant
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Graduate Relativistic rotational kinetic energy
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Graduate Einstein's June 30 1905 paper - help please with the maths
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Graduate Solutions to Field Equations with Einstein Tensor = 1
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Undergrad What is the best way to be a relativist ?
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Graduate The case for True Length = Rest Length
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Graduate Time dilation in horizontal clock
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Undergrad The Conundrum of Duplicating Atoms in Time Travel
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Graduate Radial Motion in Schwarzschild's Geometry
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Graduate Gravity as an emergent phenomenon
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Graduate Cause Precedes Effect: Proving Inertial Reference Frames
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Graduate Why is General Relativity not renormalizable?
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Graduate The Affine Connection components
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Graduate Q: Inertial Frames & Detecting Motion
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Graduate Time Dilation Puts Two Observers at different Times?
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Graduate Does an object lose mass when raised against a gravitational field?
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Graduate The Paradox of Oppositely Traveling Objects in Spacetime
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Graduate Rindler Observer: Unruh Effect & Spacetime Geometry
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Graduate Tachyon - assymetry between space and time
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Graduate Reasons for 1D Time vs 2D Time: Metrics Explained
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Graduate How Is Energy Conserved in General Relativity and Cosmology?
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Graduate Are fundamental particles singularities in the general relativistic sense?
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Undergrad Falling into a black hole and then shining a light?
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Graduate Can we communicate with people outside a black hole?
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Graduate ISV VentureStar (Avatar): acceleration problem
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Graduate Contraction in the Riemann Tensor
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Undergrad [Novice] Why isn't Time Space?
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Graduate Experimantal verification of GR
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Graduate Dokuchaev, Is there life inside black holes?
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