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 Is there a difference between rest mass and invariant mass?
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High School Time Travel & Theory of Relativity for HS Students
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Graduate What Is the Truth Behind the Misnomer of Stable Wormholes?
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Graduate Twin paradox and the size of the universe
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Graduate Light clock on Train experiment.
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Undergrad Speed of Light: Does It Slow Down in a Gravity Field?
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Graduate Proper Distance, Rest Length: What to Know
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Graduate Real Earth Diameter: SRT Calculation Revealed
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Graduate Is this an acceptable way to state the EP?
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Graduate EMrocket Engine: Does it Violate Newton's Law?
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Graduate Kaluza-Klein Theory Q&A: Inducing EM Field & Ricci Tensor
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Graduate Choice of Origin of Coordinate Systems
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Graduate Surface gravity of Kerr black hole
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Graduate Does Penrose's Andromeda paradox prove determinism?
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Graduate Explaining Universe Expansion with Gravitons in String Theory/Supergravity
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Graduate Norm of Vector Formed by Two Vectors
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Graduate A question of history concerning Rindler Coordinates
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Undergrad Questions about Gravitational Waves: Answers Here
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Graduate Will Time Dilation at 100% c Speed Result in Eternal Life?
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Graduate A direct derivation of the speed transformation formula?
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Graduate Diameter of Earth With GRT: Did Feynman Say It?
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Graduate Compare Starting w/ Ansatz vs Complete Solution
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Graduate Ricci tensor of schwarzschild metric
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Undergrad E=MC^2 Explained: Photon Mass & Energy
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Graduate Does object lose kinetic energy due to emitting gravitational waves?
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Graduate Gravitational Lensing Derivations - Is There Another Way?
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Graduate Time dilation as seen by different observers
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Graduate A thought experiment general relativity
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Graduate Are There Really 4 Isotropic Axes of Spacetime at Light Speed?
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Graduate How Does a Photon Get Absorbed at t=0?
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Graduate What Happens to the Space Between Relativistically Moving Spaceships?
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Graduate Traveling at Near Speed of Light - Questions Answered
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Graduate Bending of Light: Newton vs Einstein
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Graduate Rest Energy of Electrons in Particle Accelerators: Zero or Not?
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Graduate Compacting Matter in a Black Hole Singularity: Is It Pure Entropy?
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Graduate Euler-Lagrange Equation of $$ds^2=-f(x)dt^2+g(x)dx^2+2l(x)dxdt$$
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Graduate Modifications in General Relativity
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Graduate Near-C Speed Spinning Top: Immovable Object?
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Graduate Relativity Musings: Gravitation, Acceleration & Inertial Ref Frames
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Graduate Inverse curvature of space-time
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Undergrad Math & Relativity: Understand Einstein's Theories
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Graduate Progression of Time & Entropy: Is the Pass. Slowing?
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Graduate Lie Algebra of Lorentz Group: Weird Notation?
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Graduate Photon Rest Mass: Understand 4 Momentum & Mass
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Graduate General Theory of Relativity Question
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Graduate Momentum to Energy Conversion: Learn How it is Done
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Graduate Ball Thrown Up Follows Curvature of Spacetime
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Graduate Hawking Radiation from All Gravitational Sources?
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Undergrad Length Contraction in Special Relativity
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Graduate Rest Energy of Electron: E=m(0)*c^2=0.511MeV
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Graduate Do atmospheric muons accelerate?
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Graduate Why must the event horizon be a null surface?
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Graduate High Energy Electron Greetings: Creation of Extra Particles?
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Graduate Relativistic kinetic energy derivation (from Work expended)
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Graduate Understanding Light's Motion in a Moving Clock
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Undergrad Time dilation - effect on clock or 'time' itself?
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Graduate Twin Paradox: Will Car A Age Slower?
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Graduate Null geodesics of the FRW metric
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Graduate Does the weight of a relativistic mass change when measured on a moving scale?
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Graduate Black Hole Penrose Process: Understanding Negative Energy Condition
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Graduate Pound-Rebka Experiment: Accuracy & Data Availability
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Graduate Observable universe as a black hole
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Undergrad EMF Generated When Magnet Moves Linearly Across Its Field
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Graduate Is Classical Mechanics Wrong? A Horrible Proof of Its Inadequacy
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Graduate What Happens to Acceleration and Spatial Distances Near the Speed of Light?
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Graduate Static + Hypersurface Orthogonality
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Graduate Photon pressure within a black hole
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Graduate Where Does the Traveling Twin Lose Time in the Twin Paradox?
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Graduate Relativity of Simultaneity and the Perception of Time in Motion
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Graduate Gravitational Field of Moving, Rotating Globe: A Question
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Graduate Red Shift Q: Where Does Lost Energy Go?
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Undergrad Differences Between Doppler Effect Formulas: u & f´
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Graduate Does Relativity of Simultaneity Imply Movement Before Action?
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Graduate Light Experiments at IAP, Darmstadt: Einstein's Speculations
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Graduate Gravity: Not a Force but Curvature of Spacetime?
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Graduate How Does Time Dilation and Length Contraction Work in Special Relativity?
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View Einstein's Papers for Free on Princeton University Website
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Graduate Understanding the FRW Metric: Exploring Physical and Comoving Coordinates
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Graduate Extended Extreme Multiple Reissner Nordstrom Black holes
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Graduate Light Cone Coordinates Explained
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Graduate How to explain the curvature of space-time to students
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Graduate Analysis of the physics in Interstellar
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Graduate Does gravity field really exist?
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Graduate Understanding Microwaves: Their Function and Effects on Food in Space
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Graduate Uncovering the Constant C: Equal Mass Equals Equal Energy?
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Graduate Definition of gravity according to GR
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High School Can there be an area with no gravity?
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Graduate Geometry of Time Dilation
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Graduate Does the Twin Paradox Still Apply with Identical Acceleration Readings?
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Graduate Coordinate values of G can vary from standard value
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Graduate Could Laser Beam Shifting Enable Faster-Than-Light Communication?
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Graduate Determining Metric of Space-Time (H.P. Robertson 1949)
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Graduate How is the Faraday Tensor related to the 4-potential?
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Graduate Relativistic Effects On International Space Station (ISS)
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High School Einstein says objects do not fall to the Earth?
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Graduate Does wormhole create gravitational wave?
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Undergrad Can time dilation cause confusion in the twin paradox?
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Graduate Explanation of the following field equation
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Graduate How did Einstein derive the meaning of Schwarzchild's metric
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Graduate Israel Wilson Perjes Metric: Tetrad Formalism Reference
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