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.
Undergrad Basis Vectors & Inner Product: A No-Nonsense Introduction
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Undergrad Radial Acceleration of Rotating Singularities: Planck Length & Beyond
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Undergrad Lie Algebras & Relativity: Usefulness & Purpose
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High School Time Dilation: "Did I Use Formula Correctly?
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Undergrad What is the difference between covariance and invariance in special relativity?
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Graduate Rocket Motor Placement SR: Effects on Spaceship Acceleration
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Undergrad Modeling Simple N-body in Hypothetical Relativistic Dark Flow w/ Netlogo
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High School Object interactions in relation to space curvature....
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Undergrad Did the big bang singularity not have a history?
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Undergrad Time dilation vs the Equivalence principle
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High School Exiting Wormhole Prematurely: Where Does Your Ship End Up?
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High School Is Gravity a Fundamental Force or an Emergent Effect?
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Undergrad A paradox connected to General Relativity
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Undergrad Accuracy of Relativity vs Quantum Mechanics Measurement
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High School Gravitational Mass & Velocity: Is There a Correlation?
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Undergrad Tangible example of relativity of simultaneity
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Undergrad A minus sign in the gravitational potential
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High School Understanding Orbital Geodesics in General Relativity
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Undergrad Del with Superscript in Carroll's Equation
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Undergrad Number of Geodesics Between Two Points: Topology vs. Homeomorphism
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Undergrad Modified Schwarzschild Metric: Length Contraction Consequences
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Undergrad Interesting Derivation of Maxwell's Equations
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Undergrad Can we deal with relativistic mass once and for all?
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Graduate Usefulness of relativistic mass
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High School Understanding Resistance of Acceleration: Velocity & Force
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Insights What is relativistic mass and why it is not used much? - Comments
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High School Flat spacetime in a gravity well
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Undergrad Geodesic Maximality: Answers to Relativists' Questions
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High School Distance Expansion When Moving Away from an Object?
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High School How can the speed of light be constant for all observers?
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Undergrad Does Rest Mass Change if c Varies?
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High School LIGO Observation of Gravitational Waves: Questions Answered
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High School Speed of Light: Does It Change?
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Graduate Math of Reference Frames: Spanning Vector Space
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Undergrad Simultaneity: Train and Lightning Thought Experiment
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High School Length contraction applet - have they got it wrong?
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High School What speed and direction are we actually traveling?
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High School How can I derive the law of composition of velocities?
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Graduate Who Was Right - Poincare, Einstein or Neither
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Undergrad Lorentz Transformation Matrix: Tensor of Order 2?
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Undergrad Some geometry questions re Schwarzschild metric
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High School Mass and Time Dilation: Causes and Effects
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Graduate Riemannian Geometry: GR & Importance Summary
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Graduate Prove 2-D Lorentzian Metric is Locally Equivalent to Standard Form
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High School Why can't light travel faster than c?
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Undergrad Black Hole Radiation: Questions Clarified
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Undergrad Theory of Acceleration: Is There a Limit?
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Undergrad Find Solutions to Helical Worldline's Surfaces of Simultaneity
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Undergrad Weight of a relativistic particle
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Undergrad Why is the conservation of electric charge expressed in the continuity equation?
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Graduate Compute Commutator of Covariant Derivative & D/ds on Vector Fields
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High School Newton's Law of Gravitation: Balancing Centrifugal Force & Internal Pressure
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Undergrad Delta Notation in GR: Replacing vs Raising/Lowering
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Undergrad De Sitter Universe: Divergent Parallel Lines?
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Undergrad Light From Black Holes: GR vs QM
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Undergrad Event Horizons - Holographic Principle
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High School Lag of a clock coming back to its initial position (Twins Paradox)
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Graduate Dark Matter, Energy-Momentum Tensor & Galaxies
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Undergrad Latest Gamma Ray Burst Experimental results
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Undergrad Can anyone help me understand the Equivalence Principle
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Undergrad Metric Measurements: Explaining dx vs adx
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Undergrad Black hole event horizon confusion
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High School Gravitational Lensing: Gravity's Effect on Light
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High School Why do we Experience a 'Flow' of Time?
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High School Gravity & Mass: Acceleration, Force & Basics Explained
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Undergrad Deflection of Starlight by Newtonian Gravity - Example Calculation
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Graduate Two Dimensional Ricci curvature
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Graduate Prove EL Geodesic and Covariant Geodesic Defs are Same via Riemmanian Geometry
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High School Velocity of light and absolute rest
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High School Is the time dimension more fundamental?
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Graduate Understanding E-Field Transformation in Feynman II_26
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Undergrad How can General Relativity explain the Moon drifting apart from Earth
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Graduate Schwarzschild Derivation: Sean Carroll Notes - Theorem Name?
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Undergrad Understanding Length Contraction: What is Limit of Vanishing Transport Velocity?
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Undergrad Thermodynamics of Black Holes: Analyzing Carnot Cycles
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Undergrad Are spherically symmetric and isotropic the same
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Graduate Lense-Thirring effect - General Relativity
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Graduate Constant along a geodesic vs covariantly constant
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High School Light (not) escaping from black holes
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High School Proving Proper Time of Photon in Friedman Metric
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High School Time Travel & Causality in General Relativity
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Undergrad FRW metric derivation: constraints from isotropic and homoge
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High School Launch Spacecraft to Near c Speeds: Is it Possible?
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High School If you condense an atom, would it make a black hole?
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Graduate Why Scalar Quantities Matter in Singularity Tests
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Undergrad Transforming to Local Inertial Coordinates
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Undergrad Demonstration of relation between geodesics and FLRW metric
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Undergrad Mass of Bound Particles & Mass-Energy Equivalence
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High School Relative speed and time dilation
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High School How Does the Twin Paradox Affect Aging?
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Undergrad Gravity Inside and Outside a Moving Lift
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Undergrad Angular Velocity: Can a Body Move Faster Than C?
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Undergrad Communicating with Black Hole Time Warp: A to B and Back Again
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Undergrad Is the Scientific American Article on the Twin Paradox Accurate?
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High School Rest Frame in GTR: What Is It?
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Graduate Inverse of infinitesimal Lorentz transformation
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Undergrad Relativistic Energy Dispersion Relation: Explained
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Undergrad Derivation of E=mc2 from Four-Vector Definitions in Special Relativity
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High School Einstein's Lift Experiment: The Principle of Equivalence
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Graduate The inverse of spacetime curvature?
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