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.
B Why Shouldn't I Be Skeptical About SR Postulate No.1?
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I Can Gravity Escape a Black Hole? | GR Learning
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I Lorentz Arguments for Ether: Critical Analysis of 1895 Paper
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B Observer Moving at c: Does it Contradict Limits?
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B The precession of Mercury's orbit
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A Variation of Metric Tensor Under Coord Transf | 65 chars
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B Redshift & Energy Conservation: Questions Answered
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I Energy Component 0 of 4 Momentum Vector P
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I Special Relativity: Constant Speeds or More Complex GRT?
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I Special Relativity vs Lorentz Transformation: Difference Explained
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I Is the four current in Relativity an invariant quantity?
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I Sending Signal from Planet Near Gargantua: A Thought Experiment
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B Is Any Material Truly Incompressible Under Special Relativity?
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B Time & Special Relativity: Is Time Object-Specific?
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A Validity of theoretical arguments for Unruh and Hawking radiation
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I Transformation of the contravariant and covariant components of a tensor
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A shot in the dark -- Need help understanding Special Relativity
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I Ligo Heat Dissipation: How Do They Protect Mirrors?
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I One Way Speed of Light: Is it Constant?
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I Struggling with a special relativity "paradox"
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A Parallel transport of a 1-form aound a closed loop
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A Christoffel Symbols in terms of a Change in Basis
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I Electric Field Directly Ahead of or Behind a Moving Charge
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B Calculating Triangle Area in Relativity Theory
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I Ricci Tensor: Covariant Derivative & Its Significance
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B Time in Cartesian Coordinate Systems: Math Q&A
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A Schwarzschild Metric Geodesic Eq: Qs & Answers
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I Explanation of Galilean transformations
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B What path does matter take after entering a black hole?
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A Kinnersley’s “photon rocket” and gravitational radiation
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A Weyl transformation of connection and curvature tensors
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I Why does Special Theory of Relativity leave out Potential Energy?
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I An observer passing the event horizon of a black hole (Part 2)
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A Why Does the Energy-Stress Tensor Exclude Other Forces?
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B Eddington's 1919 Eclipse: Photon Deviation & Redshift
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I Event Horizon Gravity: Infinite or Not?
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I Can Time Dilation Probes Redefine Our Understanding of Space and Time?
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B Interstellar Movie: Light Reflection on Planet Close to Event Horizon
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A Detecting Gravitational Waves: Antenna Sensitivity & Weber Bars
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I What is the Invariant Mass of Two Perpendicular Photons?
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I Energy Density in SR Energy-Momentum Tensor
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I Solve E = mc^2 & Time Dilation Equation
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I Getting Used to Killing Vector Fields: Explained
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B Do Perpendicular Velocities Affect Relative Motion?
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I Time Dilation Effects of Travel to Star 10ly Away
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I Special Relativity Controversy: Solving the Paradox
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I The Tensor & Metric: Spacetime Points & Momentum Flux
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I An observer passing the event horizon of a black hole
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I Deriving the 4-momentum of a free particle moving in curved spacetime
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I Time Dilation: Clock A & B Confusion
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B Agreeing on relative separations and accelerations
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B Why Does Matter Fall to Center of a Mass? Explained
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B Apparent contradiction in time dilation
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B Development of Special Relativity
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B Time Travel: How Does a Fast Electron Experience Sunrise?
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I Relativistic Notation in Waves: Confusion Solved
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A Lorentz Transformations: Why We Need the Same $\gamma$
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B Relativistic explanation of electromagnetism
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I One Way Twin Revisited: Understanding Tim & Tom's Watches on Home & Northbound
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I LIGO Gravitational Wave Detection News
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B SR Thought: Spacetime Interval w/ Bounds of ##0<\alpha<1##
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I Energy Momentum Tensor: Real Physics & Cosmology
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A Heuristic Approach EFE: Why 10 DOF?
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A Difference of Christoffel Symbols Transforms as Tensor
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B What Causes Moving Clocks to Measure Slower? Explained
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I What Happens When a Planet Nears the Speed of Light Near a Black Hole?
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B Kinetic Energy of an Object Falling Into an Event Horizon
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A Solving Shapiro Delay Problem w/ Approximations: Q&A
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A Can Photon Have Orbital Angular Momentum?
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I The Simultaneity Paradox: Investigating Net Rotation of a Balanced Beam
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B Can someone tell me if I got this line from the Feynman lectures right?
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I Speed Difference of Time on Poles vs Equator of Earth and Other Planets
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B Gravitational Time Dilation in L1 Point: Summed, Canceled or Else?
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I About the solution of the parallel transport equation
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I Four-momentum & four-acceleration in GR - Physics Discussion
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B Misunderstanding of "proper velocity"
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I Does p=mc Apply To Photons? | A.P. French's Special Relativity
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I E=mc^2 Mass: Rest Mass m0 vs Relativistic Mass γm0
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B Would Earth fly off into space if the Sun disappeared?
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B Some questions about the Doppler Effect at high velocities
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A Continuity Equation for fluid in a curved spacetime
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I What happens in the area between black holes before they collide
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B What is Absolute Time and Space?
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B Plotting the Space-Time Continuum: Is it Possible?
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I How it's known that the variational principle works for relativity
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B Question About Lorentz Contraction: Red vs Blue?
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A Stress-energy tensor of a rotating rod
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A Birkhoff's theorem with cosmological constant
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I Deriving AdS Poincare Coordinates from Global Coordinates
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I Does Gravity Affect Mass Measurement in Flat Spacetime?
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A Doubt about Energy Condition in Wormhole: Integral Along Null Geodesic
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B Time Difference for High-Speed Travel: Asymmetric by Special Relativity
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A The derivation of the volume form in Ricci tensor
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I Muons Decaying on Mt Washington: Expert Answers
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I Speed of Light in Inertial Ref Frames: Photon Perspective
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I Momentum and energy calculation in special relativity
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I Metric compatibility? Why is it an additional property?
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I Gravitational Waves: Difficulty Level of Study?
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B Types of Metrics: Background & Reference Explained
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A Calculating Nabla w V in General Relativity
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