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.
High School Why does time slow when you travel at high speeds?
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Graduate What is the Invariant Magnitude of 4-Acceleration?
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Graduate Wormhole proper radial distance
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Graduate Space time with no killing vector
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Graduate How exactly does FTL travel cause reverse time travel?
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Graduate Going Faster Than Light: What Happens When We Can't Slow Down?
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Undergrad Understanding Light Speed: A Neophyte's Question Answered in Simple Terms
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Graduate Flat sheet-like structure approaching a massive object
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Graduate The factor of 1/2 in the Einstein-Hilbert action
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Graduate Gravitational Forces on Mass < Planck Mass: Evidence?
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Graduate Can the black and white holes combine?
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Graduate Is Spacetime Like a Fluid with Surface Tension?
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Undergrad Text(s) for Relativity for Poets course?
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Graduate Is Penrose's Twistor Theory Worth the Effort for Understanding Physics?
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Graduate Is Lorentz Transformation an Application of Pythagoras's Theorem?
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Graduate Paradox within relativity of simultaneity
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Graduate Derivative of Solid Angle: Lightmann & al. Explained
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Graduate Quantum Entanglement Information.
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Graduate Object with *multiple* velocities nearing the speed of light-effect?
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Graduate Neutrinos - what is their mass when they travel so close c?
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Graduate Black Hole Equations: Unraveling the Mystery - Adrian
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Graduate Contemporary Physics: Preserving Einstein's Brilliance
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Graduate How Can Light Be Affected by Black Holes Despite Having No Mass?
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Graduate Herglotz-Noether theorem understanding
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Graduate Is the Bell's Spaceship Paradox a Result of Relativity of Simultaneity?
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Graduate What factors affect the reaction time of a long bar?
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Graduate Can the Constant plane hypothesis be applied to accelerating frames?
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Undergrad Does Light Have Mass or Not?
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Graduate Questions regarding Lorentz force
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Undergrad Einstein's SR a description of observations or a description of realit
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Graduate Simple Derivation (1D) Lorentz Transformation
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Graduate Rotating Disk Spinoff: Is 3D Timelike Congruence Born Rigid?
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Graduate Did MMX's Assumptions on Light and Sound Waves Affect Their Findings?
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Graduate Hamiltonian Formulation of GR for Elliptic Spacetime?
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Graduate The Twin Paradox: Triplets Edition
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Graduate Is the Electromagnetic Field Everywhere?
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Graduate Is the unsynchronised clock actually at the place where seen to be
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Graduate Why wouldn't black hole singularity evaporate before it can form?
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Graduate Hyperbolic path in Minkowski space
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Graduate Can a twin paradox occur if one twin never changes direction or stops?
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Graduate How to plot correctly spacetime diagrams
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Graduate Why is the speed of light considered a constant in physics?
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Undergrad Same Speed for Ball Thrown from Moving Car?
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Graduate A few very basics questions regarding 4 and 3 momenta and the trace of
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Graduate Light is slower if object moves fast
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Graduate Trying to reconcile Lorentz Transformation and Length Contraction
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Graduate Tensor equation in Dirac's 1975 book
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Graduate Deriving Lorentz transformation
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Graduate Conservation of relativistic angular momentum
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Graduate Why GRT is the proper correction of gravitomagnetism?
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Undergrad E = mc^2, so how can anything have zero mass?
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Graduate Space expansion, gravity waves, warp
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Graduate 8*pi in the Einstein field equations?
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Graduate Derivative of det(g): Confirmation Needed
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Undergrad Comparing Newton and Einstein - Who is Correct?
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Graduate What Happens to the Twins' Ages in the Twin Paradox?
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Graduate Shift in Mercury's Perihelion by finite light speed
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Graduate Visualizing Mass Acceleration to Speed of Light: Is E=mc^2?
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Graduate Conservation of Energy in General Relativity
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Graduate Contra-Variant Vector Transform: Taking Partials
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Undergrad Confused with Special Relativity
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Graduate Need help with time dilation and length contraction.
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Graduate Does Mass or Size Affect Curvation in Relativity?
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Graduate Challenges in Merging GR and QM from a Lagrangian Perspective
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Graduate Construct electromagnetic stress-energy tensor for a non-flat metric
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High School Going the speed of light, possibly.
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Graduate Is Light Massless? Evidence & Experiments Explained
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High School Time moves forward, what if you move UP or DOWN? Does time stop?
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Graduate Unable to see how light's one-way speed can be c experimentally
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Graduate Possible Exits Simultaneously in Two Positions: Explained
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Graduate Relativity of Simultaneity Issue
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Graduate Gravity: Warping of Space or Force?
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Graduate Gravitating Perfect Fluid Solution & Mass/Energy Total
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Graduate Flat Spacetime at Event Horizon?
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Graduate Thin rotating disc under constant acceleration.
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Graduate Killing fields as eigenvectors of Ricci tensor
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Graduate Does the Vacuum Solution in General Relativity Hold in the Presence of Matter?
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Graduate Galilean principle of relativity
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Graduate A question about the equivalency principle
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Graduate About c being constant and interaction at c.
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Graduate Relativity and Distance Measurement in Physics | PF Community Discussion
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Graduate How is the deficit angle due to a relativistic cosmic string derived?
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Graduate Question on General Relativity from a layperson
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Graduate Is ruler or radar measurement more accurate in defining length in relativity?
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Graduate Coordinate charts and open sets
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Graduate Explaining Time Dilation in a Simple Way
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Graduate Geometrical meaning of Weyl tensor
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Graduate Lorentz transformation for time - why the 'x' term?
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Graduate If time didn't exist could anything move or even happen?
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Graduate Why Is Gravity Infinite at a Black Hole's Center but Zero at Earth's Center?
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Graduate What is the Effect of Motion on the Velocity Vector of Light?
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Graduate Momentum of light sans Maxwell
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Graduate Is Relativistic Electromagnetism Affecting a Test Charge Above a Moving Wire?
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Graduate Back with more relativity questions
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Graduate How Would Physics Change Without Covariant and Contravariant Tensors?
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Undergrad What is the significance of this equation on my t-shirt?
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Graduate Question about symmetry of length contraction
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Graduate Does Length Contraction Occur If Measuring Tools Contract Equally?
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Undergrad Explanation of expanding universe
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Graduate Twin Paradox & Neutron Speeds: Questions Explored
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