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 is the speed of light a constant?
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Graduate Teaching SR without simultaneity
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High School Clock Ticking in Gravitational Well: Observation Rate
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High School How to derive the Lorentz transformation in the simplest way?
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Undergrad Is there only one structure of the universe?
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High School Why is Lorentz Ether Theory Hard to Rule Out?
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Undergrad The Good Guy Fluctuation: Is Sheldon's Second Line Making Sense?
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High School Check my understanding of Time Dilation and Length Contraction
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High School Listen to Record from Planet w/ Extreme Gravity
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Undergrad Relativity of simultaneity doubt
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Undergrad What would be the form of this world line?
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Undergrad What's the underlying frame of the Einstein's Field Equation?
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Undergrad Why Do Longer Wavelengths Go Slower in Glass?
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High School Does Relativistic Speed Affect Mechanical Watch Oscillation?
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Graduate Why is the Principle of Equivalence Necessary for GTR?
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High School Measuring Light Velocity Correctly: Thought Experiment
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High School Gravitational Orbits: How the Earth Knows Where to Go
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Undergrad Kinematic Decomposition for "Rod and Hole" Relativity Paradox
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Graduate Can Einstein Tensor be the Product of Two 4-Vectors?
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Undergrad Time & Gravity in Rotating Faster Than Light?
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Undergrad Light Speed in Dense Medium: Explained
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High School Is energy really not conserved in a constantly expanding Universe?
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Undergrad Transform Coordinates for Torus Metric in Wald
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Undergrad Unruh Effect (1+1)D: Understanding Equation 5.68
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Undergrad Show Maxwell's Eqns. on a Cauchy Surface (Wald Ch. 10 Pr.2)
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Undergrad Quasi-Static Change of Event Horizon Area
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Undergrad Determine Scaling Dimension of Field Theory
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High School Pendulum Clock vs GR: Time Discrepancy
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High School Could There Be a Cosmic Speed Limit Higher Than the Speed of Light?
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High School Measuring Light's Brightness & Power Flux Relative to Observer's Speed
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Undergrad Minkowski Spacetime KVF Symmetries
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Undergrad Ex. 19 Gauge Fields, Knots & Gravity: Is Rotation Correct?
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Undergrad Yang-Mills Stress-Energy Tensor Explained
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Undergrad Space/Spacetime Metrics: Comparing Routes in PHY 101
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Undergrad Relative Simultaneity: Comparing 2 Incompatible Calculation Methods
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Undergrad Judge Original Time & Length Special Relativity
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Undergrad Because of length contraction, does absolute position exist?
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High School What is a suitable term for relativistic length in STEM education?
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Graduate Massless Particle Action under Conformal Killing Vector Transformation
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High School The Paradox of Relativity Length Contraction
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Undergrad Synchronous Frames/Coordinate Charts
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Undergrad Analyzing Dynamics in Constant Acceleration w/Rindler & Equivalence
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Undergrad Can Thinking Fast Slow Down Time in Relativity?
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Graduate Covariant Derivative of Stress Energy Tensor of Scalar Field on Shell
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Undergrad Coord. Time Vector Field: Schwarzschild vs Gullstrand-Painleve
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Undergrad What is the angular velocity of a satellite?
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Undergrad Lorentz Transf. of Complex Null Tetrads: Formula (3.14-17)
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Insights PF's policy on Lorentz Ether Theory and Block Universe - Comments
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Undergrad Michelson & Morley in Space-Time Diagram: Can't Make it Work
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Undergrad How things appear to an accelerated observer
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Undergrad Linear Accelerator Length Contraction
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High School Harold White's Warp Drive Research: Casimir Effect Insight?
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High School Adorable Gravity Demo - National Medals Lab
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Undergrad Gradient as vector vs differential one-form
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Graduate Characterizing GR Traj in Minkowski Space
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Undergrad Double Pulsar: 16 Year Study Validates Relativity
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Undergrad Global simultaneity surfaces - how to adjust proper time?
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Graduate General Relativity: Section 5.1 Homogeneity & Isotropy Analysis
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Undergrad SR "Paradox" Thread Continuation: Tilt of Plates & Simultaneity
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Graduate B and A in Curved Space Time: Does \nabla \times A =B?
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High School Solving the twin paradox with special relativity
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Undergrad Time Dilation at Moving Black Hole Event Horizon
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High School Explaining a Stronger Relativity Paradox than the Twin Paradox
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Undergrad LIGO: Detecting Differences Less Than a Proton Length - How is It Possible?
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High School Special Relativity & Lorentz Transformation Q: Clock C2 Reading?
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Graduate Re-writing the geodesic deviation eqn in matrix notation (3d only)
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High School What experiments confirmed the constant velocity of light?
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Undergrad Can I get a clarification on my misunderstanding of SR?
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Undergrad Equations Using Comma-Goto-Semicolon Rule in Curved Spacetime
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High School Einstein's train-lightning scenario doesn't demonstrate relativity
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Graduate Einbein as Lagrange Multiplier: How Does it Work?
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Undergrad Does light escape the Universe?
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Graduate Differential equation for affine parameter
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Undergrad Kerr Metric Bibliography: Resources for Timelike Geodesics
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High School Calculating Energy Loss of Muon Moving Through a Medium
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Graduate Energy, mass and Noether’s theorem
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Undergrad Are Geometric Points Affected By Forces?
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Undergrad Time Dilation vs. Doppler Effect: Similarities & Differences
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Undergrad Is movement really relative or absolute?
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Undergrad Do Photons Attract Each Other?
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High School The Mini Rocket Experiment: A Test of Einstein's Equivalence Principle?
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High School Spatial curvature around a spherically symmetric mass
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Undergrad Piecewise Functions in the Einstein Field Equations
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Undergrad Sufficient Conditions for Strong Cosmic Censorship
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Undergrad Can Placing Earth Between 3 Black Holes Slow Down Time?
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Undergrad Simplification of Dark Matter effects
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Graduate Einstein Field Equations: Spherical Symmetry Solution
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Undergrad What if Einstein equivalence principle is proven wrong one day?
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High School Time Travel: Is It a Meaningless Concept?
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Undergrad Comparing Spacetime and Thermodynamic State Space Manifolds
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High School General Relativity as a Challenge for Physics Education
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Undergrad Reference frame vs coordinate system
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Undergrad On the gravitational collapse of a massive shell
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Undergrad If one of the dimensions of our solar system contracted ....
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Graduate Flat Embedding of Our Universe: Questions & Answers
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Undergrad Do we know how many meters long one second is?
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Undergrad What happens to time on the hands of a clock?
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High School Special Relativity and Light -- How does speed of an object affect time?
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Undergrad Understanding Special Relativity and Coordinates
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Undergrad Do Physicists Literally Believe We Move Through Time?
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