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.
I Global simultaneity surfaces - how to adjust proper time?
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A General Relativity: Section 5.1 Homogeneity & Isotropy Analysis
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I SR "Paradox" Thread Continuation: Tilt of Plates & Simultaneity
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A B and A in Curved Space Time: Does \nabla \times A =B?
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B Solving the twin paradox with special relativity
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I Time Dilation at Moving Black Hole Event Horizon
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B Explaining a Stronger Relativity Paradox than the Twin Paradox
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B Special Relativity & Lorentz Transformation Q: Clock C2 Reading?
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A Re-writing the geodesic deviation eqn in matrix notation (3d only)
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B What experiments confirmed the constant velocity of light?
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I Can I get a clarification on my misunderstanding of SR?
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I Equations Using Comma-Goto-Semicolon Rule in Curved Spacetime
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B Einstein's train-lightning scenario doesn't demonstrate relativity
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A Einbein as Lagrange Multiplier: How Does it Work?
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A Differential equation for affine parameter
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I Kerr Metric Bibliography: Resources for Timelike Geodesics
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B Calculating Energy Loss of Muon Moving Through a Medium
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A Energy, mass and Noether’s theorem
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I Are Geometric Points Affected By Forces?
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I Time Dilation vs. Doppler Effect: Similarities & Differences
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I Is movement really relative or absolute?
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I Do Photons Attract Each Other?
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B The Mini Rocket Experiment: A Test of Einstein's Equivalence Principle?
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B Spatial curvature around a spherically symmetric mass
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I Piecewise Functions in the Einstein Field Equations
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I Sufficient Conditions for Strong Cosmic Censorship
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I Can Placing Earth Between 3 Black Holes Slow Down Time?
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I Simplification of Dark Matter effects
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A Einstein Field Equations: Spherical Symmetry Solution
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I What if Einstein equivalence principle is proven wrong one day?
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B Time Travel: Is It a Meaningless Concept?
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I Comparing Spacetime and Thermodynamic State Space Manifolds
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B General Relativity as a Challenge for Physics Education
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I Reference frame vs coordinate system
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I On the gravitational collapse of a massive shell
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I If one of the dimensions of our solar system contracted ....
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A Flat Embedding of Our Universe: Questions & Answers
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I Do we know how many meters long one second is?
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I What happens to time on the hands of a clock?
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B Special Relativity and Light -- How does speed of an object affect time?
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I Understanding Special Relativity and Coordinates
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I Do Physicists Literally Believe We Move Through Time?
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I Universal Block Theory: Free Will
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B Proving Special Relativity w/ Standard Equipment
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B Confused about time dilation and cosmic speed limit
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A Sign of Curvature in Flamm's Paraboloid: Negative?
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A Question on Equation in Zee's Gravity in a Nutshell P107
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B Finding One-Way Speed of Light: Use One Clock
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I Could Tachyons Discredit Relativity?
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B Black Holes: Can Anything Reduce Their Size?
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I Lorentz Invariance of Q in Weinberg: Justifying Transformation
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A Unruh & Minkowski Modes: Analytic Extension Explained
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I Gravity: Force or Acceleration?
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A Is gravity simply an interaction in the gauge theory of gravity?
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A Prove Fermi-Walker Transport of Gyroscope's Spin Vector w/No Applied Moment
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I Normalization Constant in Einstein-Hilbert Action
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I Falling into a Black Hole: Blueshift Questions Explored
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B FAQs about Bobrick & Martire's Warp Drive & Lentz's Paper
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I Do Fictitious Forces Still Matter in General Relativity?
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I Linearized Gravity & Metric Perturbation when Indices Raised
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I Variation of Four-Velocity Vector w/ Respect to Metric Tensor
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A Merger of Extremal BHs Causes Naked Singularity?
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A Tony Rothman Questions E=mc^2 in American Scientist
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B Paradox in the block universe interpretation
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B Time Dilation: How Does Speed Affect Aging?
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B I have a few questions about Warp drives? I am a layman.
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B Understanding Entangled Particles in Different Time Frames
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I Black hole inside of a black hole.... can it be done?
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I Clarification on Rindler coordinates definition
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I The Universe filled with a "homogeneous perfect fluid"
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B Do black holes determine time's arrow?
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I A problem with the solution to the ladder paradox
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B Basic introduction to gravitation as curved spacetime
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I Is the sign of the Einstein equation right in Chandrasekhar's Black holes?
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B Can we see matter crossing the Event Horizon with a powerful telescope?
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I Assumption in the derivation of the Lorentz transformation
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B Gravitons: Relationship to Space-Time & Black Holes
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B Is length contraction (Lorentz transformation) an illusion or real?
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I Understanding Jacobian Matrix Transformation in Special Relativity
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I Definition of Rindler Horizon: A Global View
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I Absolute meaning of spatial deviaton angle of light around the sun
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A Rindler Horizon Subtleties: Advanced Discussion
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I Bondi ##k##-factor concept from first principles
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B Equivalence Principle and Rindler Horizons
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Insights Geodesic Congruences in FRW, Schwarzschild and Kerr Spacetimes
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B Distance Length Contraction at Light Speed
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I Observer Inside Collapsing Shell
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B Why does it require an infinite amount of energy to reach the speed of light?
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B Is there an inside to a Black Hole?
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I Is acceleration absolute or relative - follow up
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I Reference frame vs coordinate chart
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I Uncover Traps in Spacetime Diagrams: Bob & Alice's Cases
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I Request for Input: 2D Minkowski Spacetime Diagram Generator
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A Radial Excess Calc: GR, 4πGρ & R00
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I Time Dilation on 3D Torus: Clock Speed & Why It Matters
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I Detecting Gravitational Waves w/ Interferometers: Explained
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Insights Relativity using the Bondi k-Calculus - Comments
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I Gravitational Field of Electromagnetic Waves: How is it Generated?
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Insights Relativity Variables: Velocity, Doppler-Bondi k, and Rapidity - Comments
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I A computation of an integral on page 344 of Schutz's textbook
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