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 How can time dilation be the same for both observers?
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Undergrad Relation between Poincare matrix and electromagnetic field t
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Graduate Geometry and integral laws of physics
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Undergrad Ricci Tensor in Vacuum Inside Earth - Ideas Appreciated
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Undergrad Can c be set equal to 1 in certain systems of units?
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Undergrad Measuring Coordinates in Strong Gravity: Schwarzschild Metric
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High School Gravitational waves 50X total stars and not be felt?
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Graduate Length contraction and time dilation from Lorentz S
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Graduate Time dilation for the clock in the orbit
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Graduate Gravitational law of induction
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High School Why the Earth moves around the Sun forever and ever and ever?
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High School How Does Einstein's Theory Affect the Age of Light?
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Undergrad Time Dilation Between Astronaut A and Person B
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Graduate Geodesic defined for a non affine parameter
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Graduate How do we measure that two objects can have different time?
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High School General Relativity and Newtonian Mechanics
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High School Why are the gravitational waves we have detected so faint?
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Graduate Einstein and Lenard in Bad Nauheim
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High School Time Dilation: Effects on Spinning & Vibrating
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Undergrad How Does the Twin Paradox Illustrate Time Dilation in Special Relativity?
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Undergrad LIGO BH Merger & Black Hole Information Paradox
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Undergrad Light Acceleration: Does Light Really Accelerate?
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Undergrad Confusion about derivation for isotropic fluids
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Undergrad What Are the Modern Understandings of Time in Space-Time Theories?
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High School Gravitational Time Acceleration: Is It Possible?
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Undergrad Understanding Light Behavior in a Moving Train: Explained
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High School Relativity & Physics Concepts: A Book Explained Simply
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Insights Orbital Precession in the Schwarzschild and Kerr Metrics - Comments
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High School Visualizing Spacetime: 3 Dimensions Not Enough?
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Undergrad Galilean transformation paradox help
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Undergrad Age Slower or Faster in Center of Earth? Time Dilation Explored
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Undergrad Reconsidering Gravity: The Illusion of a Fourth Force Revealed
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Undergrad Can an object accelerate at a constant pace forever?
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Undergrad How Does Length Contraction Affect Train Wheel Rotation at Near Light Speeds?
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High School How Would Time Run Without Movement? G.R. & S.R. Explained
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High School Pronouncing Subscripts in General Relativity
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High School Black Hole At The Center Of The Earth
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Undergrad Does Space-Time Exist Without Energy?
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High School Deriving P=γ(u)mu: A Relativistic Momentum Exercise
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High School Help Understanding special relativity
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Undergrad Time Dilation Observation: What Does Earth Observe?
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Undergrad Clarifying SR Notation for Advanced Mechanics Course
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High School In what year was wormhole collapse discovered?
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Undergrad What is the hierarchy of time: Δt, Δs, and Δτ?
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High School Free Will & Relativity: A Thought Experiment
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High School Riddle of the Bomb in Train: Solve the Mystery!
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High School Is the Speed of Light Governed by an Ether?
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Graduate Noether's Theorem: Julien's Calculation Mistake?
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Graduate Local Existence & Uniqueness of Vacuum EFE Solutions
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Graduate Solve Gravitational Interferometer & Geodesics
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High School How do special relativity equations apply to spacelike separated events?
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Undergrad Solving the Gravitational Field Equations
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Undergrad Should Einstein's Field Equations be modified for cosmology?
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Undergrad Is the Energy Stress Tensor of Dust Always Zero Inside a Moving Cloud?
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Graduate Numerical integration of motion
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High School Cox & Forshaw: "Why E=mc^2" - A Newbie's Question
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Undergrad About the Equivalence Principle
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Undergrad Quasars: What Metric Should You Use?
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Undergrad Relativistic doppler shifted blackbody color?
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High School Problem with the atomic clock and time dilation
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Undergrad Vector to scalar potential, transformation of fields
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Graduate "Simple" 4D Kerr Geodesics simulator, source code and docs
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Undergrad Christoffel symbols of Schwarzschild metric with Lagrangian
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High School What Is the Physical Meaning of Curvature in General Relativity?
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Undergrad At Speed of Light: Standing Still?
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Graduate Einstein's Real Motivation Behind GR
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High School Orbital Mechanics: GR vs Newton's Laws
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Undergrad How to bridge the gap between these approaches to SR?
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Graduate How can we really state that mass (or energy ) is conserved?
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High School Can Cosmological Constant contract (negative)?
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Graduate Learning Advanced Math Notation for Self-Studying Physics
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Undergrad Volume vs Circumference of Massive Body
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Graduate Exploring Huygens' Principle: Odd # Spatial Dimensions & Beyond
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Undergrad How Does Gravity Propagate Through Different Mediums and Energy Fields?
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Undergrad Can Snell's Law Be Derived by Passing to a Moving Frame?
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Undergrad What is the predicted location of gravity in orbiting objects?
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Undergrad Does the momentum of a photon change in a medium with varying speeds of light?
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Undergrad Deriving Φ of Light Around a Massive Body: Exploring Einstein's Equation
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Undergrad General Relativity vs Newtonian Weak Field: G Force?
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High School Solving Weird Time Dilation Question w/ Spaceships
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Graduate A Quantum Theory of Spacetime, the Physical Reality of Cross
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Undergrad Beyond the Speed of Light: Objects Beyond the Observable Universe
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Undergrad Moving Schwarzschild Black Hole
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Undergrad Can Heat Differential Generate Thrust?
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Graduate Black Hole information paradox and evolution in time
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Undergrad Geodesic Equation: Lagrange Approximation Solution for Schwarzschild Metric
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High School Toy GW Detector Model: "Hook Law Force
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High School How come GR doesn't describe other forces with curvature?
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High School Space-Time: Definition & Meaning
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Undergrad Solve SR 'Paradox': Find Flaw in Argument
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Insights Relativity on Rotated Graph Paper - Comments
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Undergrad Two black holes colliding - visual
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High School What is the nature of spacetime?
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High School How Does Time Dilation Influence Perceived Velocity?
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High School Euler-Lagrange equation for calculating geodesics
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Undergrad Gravitational Waves: Propagation or Present?
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Undergrad Lorentz Transformations in the context of tensor analysis
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Undergrad Can the Size of the Event Horizon change faster than c?
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High School Temperature of an accelerating system
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Undergrad Why are scalar fields Lorentz invariant?
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