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 Do state variables in general relativity have analogies in electromagnetism?
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Undergrad Supernova 100,000 Light Years Away: Agree on Time?
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Undergrad The Schwarzschild Radius: Mass vs. Energy
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Graduate Gauge Transformations: Understanding Lorentz Condition
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Undergrad What is a Covariant Relation? GR Problem Solution Explained
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Undergrad How to Write T_{\mu v} for Energy-Momentum Tensor
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Undergrad Gravitational Waves: Hardest GR Topic?
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Undergrad What happens when twins synchronize clocks and one teleports?
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Undergrad Variation of Metric and the Energy-Momentum Tensor: Where Am I Going Wrong?
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Undergrad Solving Vanishing Tensor Eqn & Raising All Indices
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Undergrad Beginner question about tensor index manipulation
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Undergrad Convert 2x2 Matrix to 1x1 Tensor
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Undergrad Definition of Second-Order Tensor by Jim Adrian
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Undergrad Why Does Special Relativity Not Contradict General Philosophy?
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Undergrad Black Hole Bomb Effectiveness: Mirrors or Wormholes?
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High School Unifying Non-Gravity Forces & Spacetime Warping
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Graduate Gauge Invariance of Transverse Traceless Perturbation in Linearized Gravity
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High School Light's Speed & Moving Observer: What Happens?
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Undergrad Equivalence Principle & Geometry: Ben Crowell's General Relativity
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High School Demonstrating Time and Distance Effects of a Martian Signal
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High School Sum up Questions for Gravitational Waves & Weighing Scales
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Undergrad Which clock was slower in special relativity?
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Undergrad Is the choice of metric signature truly just a convention in physics?
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High School LIGO Arm Length & Sensitivity: What's the Relation?
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High School Gravitational Waves: Impact & Effects on Gravity
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Undergrad Irreducible Representations of EM-Tensor Under Spatial Rotations
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Insights Intro to Centrifugal Force Reversal in Kerr Spacetime
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Undergrad Muon Time Dilation in Accelerating Frames
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Graduate Spaghettification: Geometrical & Mathematical Description
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Undergrad Momentary Co-Moving Reference Frame in SR
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High School Einstein's Train: Light Travel Time Explained
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Undergrad Energy in the Schwarzschild spacetime
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Graduate Understanding Differential Forms: Torsion, Spin & Tetrad
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Undergrad Does Spacelike Worldlines Exist?
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High School Fundamentals of Lightspeed: Questions & Answers
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High School The speed of light: Was Einstein's second postulate not so revolutionary?
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High School Time Dilation: Orbit Earth at Light Speed, What Happens?
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Undergrad How to call an invariant quantity?
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Undergrad Transformation of Intrinsic Spin: Does it Transform Like a 4-Vector?
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High School Photon Frequency: How Special Relativity Affects Light
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Undergrad How Does Hawking Radiation Lead to Black Hole Evaporation?
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High School Speed of Light & Sound: Revolutionary Phenomenon?
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High School Earth Center of Mass: GR & Inertial Object Acceleration
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Undergrad The 1964 W. Bertozzi experiment
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Undergrad Observing Black Hole Collisions: Time Dilation Explained
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High School Understand Spacelike Timelines: Carroll Page 71
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High School Light Clock & Length Contraction in GR
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High School Does E=mc^2 apply to gravitational potential energy?
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High School Understanding Tensor Indices and Conservation
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Undergrad Acceleration Frame in SR: References for Research
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High School Gravitational Waves: A Question on Earth's Magnitude & Frequency
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High School Photon Energy Change: Speed of Light
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High School Gravitational Waves: Prevalence Across the Universe
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High School Measuring Gravitational Waves w/ Elevator Accelerometer
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High School Modern Cavendish vs LIGO: Gravity Scale & Wave Interruption?
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Undergrad Understanding Michelson Morley Experiment
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High School Time Dilation & Length Contraction: Physics Explained
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High School Gravitational Waves in Positively Curved Universe?
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Undergrad Equation for Gravity Going to Zero at Finite Distance?
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Graduate Questions about derivation of GR and applications of it
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High School Converting Newtonian momentum into relativistic momentum
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High School Help Interpreting SR Animation: Human-Scale Story
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Undergrad Lorentz Force Equation: Coercion & Maxwell Stress Tensor
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Undergrad Does Acceleration Affect Event Horizon Location?
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Undergrad Event Horizon Radius: Is it Constant?
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High School How Does Parallel Transport Affect Vector Components and Their Changes?
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Undergrad Big Bang: Size & Matter of Universe Explained
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Undergrad Is space curved at the center of gravity?
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Undergrad Twin Paradox Time Dilation in Positively Curved Universe
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Undergrad Understanding the Stress-Energy Tensor in Special Relativity
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Undergrad Inertial & non-inertial frames & the principle of equivalence
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High School How does mass affect the curvature of spacetime inside a black hole?
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Graduate Riemann Tensor Formula in Terms of Metric & Derivatives
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Undergrad Virtual Tidal Effect in Accelerating Ship - Does it Exist?
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Graduate Coordinate Infall Time for a Vaidya Black Hole
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High School Do things that fall into black holes ever reach the singularity?
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High School Speed of Light & Expanding Universe: Does Hubble's Law Violate Rule?
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Undergrad Lorentz Transforms of Electromagnetic Fields
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High School Wormholes & Warp Drives: Refuted by AANEC?
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Undergrad Why Do Objects Fall Along Spacetime Ripples?
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Insights Learning Twin Paradox for Freely-Falling Observers
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Undergrad A question about time dilation
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Undergrad Relativistic Effect of Time Dilation: What is it Called?
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High School Time Dilation: Direction of Motion's Effect
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High School A thought experiment about the Sun vanishing
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Undergrad Inquiry about a derivation in "A First Course in GR" by Schutz
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Undergrad Congruence vs Family of Worldlines: Taking Notes
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Undergrad Spacetime distance between spacelike related events
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High School Space & Time: How Are They Related?
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Undergrad Lorentz Factor Variant: Derivation & Angle Dependence
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Undergrad Compatibility of Determinism & CTC in General Relativity
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High School Photon Speed: Does it Need a Reference?
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Undergrad Equivalence principle: an electric charge and a coil
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Undergrad Twin Paradox Freely Falling Observers
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Undergrad Lorentz transformation for derivatives
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High School Gravity Inside a Hollow Sphere
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Undergrad Explore How Dropping Objects Into a Black Hole Changes It
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High School Can You Experience Time and Decay While Falling Into a Black Hole?
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High School Special Relativity for Beginners: Clock Comparison
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High School Particle Disintegration and Momentum Conservation in Relativity
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