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 Accelerating to the speed of light
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Undergrad Why does the stone stop before reaching the surface at the other end?
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Graduate Is there an invariant tensor for metric under all 10 motions?
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Graduate Carlip's explanation of lack of gravitational aberration
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Graduate A oarticle traveling at c is length contracted to what?
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Graduate Length Contraction causes Time Dilation?
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Graduate Do I have time dilation right?
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Graduate Tensor algebra with derivative of the metric
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Graduate Understanding the Speed of Gravity: GR vs. SR and the Impact on Orbital Dynamics
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Graduate Time elapsed for observer (from POV of Traveler)
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Graduate The part of relativity I never got, reference frame
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Graduate Nullity of wave 4 - vector for grav. plane wave
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Graduate Does Money Have Inertia When Orbiting a Black Hole?
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Graduate If you were traveling in a spaceship that had a velocity JUST under light speed
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Graduate How can a train appear shorter to an outside observer due to its speed?
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Graduate Space time distortion grid representations
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12 year old autistic savant claims theory of relavitiy is wrong
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Graduate Does the Lorentz Force Magnitude Change Between Inertial Frames?
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Graduate Angular momentum conservation.
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Graduate Accelerating trajectories in relativity
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Graduate Solving the Mystery of Relativity: Can You Travel Faster than c?
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Graduate Geodesics on a cone in flat space
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Graduate Theoretical Astrophysics: Superdense Mass & Gravity Pull on Galaxies?
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Graduate What is the alternative form of the extrinsic curvature in Carroll App D?
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Graduate Calculating Light Travel Time in a Moving Reference Frame
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Graduate If two trains traveling at 0.5c collide head on
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Graduate Weight Measurement on Mutually Orbiting Planets
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Graduate Diffeomorphism Invariance in GR
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Graduate Lorentz Invariant Vectors and Grammatical Errors
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Graduate Self-replicating fields in EM radiation?
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Undergrad Can Gravity Affect the Laws of Physics?
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Graduate Mass inflation exactly equals time dilation?
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Graduate Which Clock Accumulates More Time in the Train Paradox of Relativity?
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Graduate Why Don't Quantum Mechanics and General Relativity Overlap?
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Graduate SLAC Electrons: Mass, Velocity & EM Energy
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High School Can gravitational influence be measured?
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Graduate Explore Relativity with Interactive Flash Diagrams
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Graduate Simultaneity in General Relativity and Problem with coordinate systems concepts.
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Graduate Why Does Griffiths Use Two Directions of Light in His Length Contraction Proof?
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Graduate Amplitude of wave stretched as well as red shift?
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Graduate Is the speed of light actually constant or just always measured to be the same?
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Undergrad How Does Newton's Gravitational Constant G Fit into Einstein's Relativity?
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Graduate Schwarzschild vs Gullstrand–Painleve and event horizons
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Graduate Gravitational mass defect, weyl metric
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High School Hair brained, universal mapping theory (nonsense ?)
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Graduate Can X4 Be Regarded as Spatial?
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High School Speed of Gravity: Learn What it is and How it Works
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Graduate What Are the Killing Vectors of the Schwarzschild Metric?
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Graduate Mass Bending Space: Theories Explored
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Graduate Space Probe vs the Sun - Relativistic Frames of Reference
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Graduate Lorentz Invariance as local limit of Bigger Manifold
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Undergrad Invariant Quantities in SR: Explained
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Graduate How does the length contraction work for proper length?
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Graduate What happens to density as speed increases?
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Undergrad If Earth's orbital speed doubled, would its mass and gravity double?
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Graduate 'Mass' of an object at different positions in a weak gravitational field
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Graduate Spacetime curvature: Real or Not?
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Graduate Kinetic energy and curved space-time
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Undergrad Why Do People Age Slower When Traveling Near the Speed of Light?
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Graduate Understanding Special Relativity: Train Example and Time Dilation Explained
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Graduate Dynamics of self-gravitating dust
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Graduate Why does a key drop to the floor when released from my hand?
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Graduate Does Heat Energy Increase the Rest Mass of a Substance?
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Graduate Angular velocity and c: Is this a paradox? Can you explain it?
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Undergrad Is Mass Really Condensed Energy
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Graduate Fizeau. What is connection between fringe shifts and velocity?
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Graduate Question about event horizon and Rindler space
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Graduate Time dilation yes, why no contraction?
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Graduate Is the Reissner-Nordström repulsion real?
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Graduate The origin of the inverse square law
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Graduate Communicating Through Time: MacBeath & Nahin's Ideas
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Graduate Gravitation of moving objects
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Graduate The question is: Can GR be derived from the Einstein-Hilbert action?
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Graduate Faster than light travel: it either constantly happens or never
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Undergrad Cause of Gravitation: What Is It?
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Graduate Antigravity in General Relativity
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Graduate Clock Acceleration in a Spacecraft: Calculating Variation Post-Acceleration
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Graduate Diffeomorphism and constant curvature
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Graduate How to obtain Kerr Metric via Spinors (N-P Formalism)
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Graduate Galilei, Poincare and conformal symmetry
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Graduate Why do we perceive time to pass at the rate that we do?
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Graduate On the Physical Separation of Time
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Graduate How can I Bel-decompose the Riemann tensor over SO(3,3)?
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Graduate The Lorentz Transformations and the Uncertainty Principle
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Graduate Having trouble writing down a metric in terms of metric tensor in matrix form?
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Graduate Is Gravity Really a Force or Something Else?
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High School The Constant Speed of Free Falling Objects
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Graduate E & M Magnetism Relativity Paradox
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Undergrad Could Zero Distance Create Infinite Gravitational Force?
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Undergrad E=mc^2 Explained: Momentum and c
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Graduate Is atom created if time is taken away from space and acceleration?
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Graduate Surviving the event horizon: some thoughts
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Graduate Rest Mass and Preferred Frame of Reference
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Graduate Mass of electromagnetic waves
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Graduate How to be an Inertial Observer?
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Graduate Advanced/Retarded Eddington-Finkelstein Coordinates and Incident/Outgoing Wave
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Graduate Constancy of speed of light and galiliean transformation
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Graduate Can someone please explain to me why massless particles follow null geodesics?
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Graduate What Determines the Speed of Gravitational Waves?
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Graduate Is Absolute Rest Possible in a Universe Governed by Relativity?
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