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.
A GR Unphysical Aspects: Time Protection Hypothesis & Riemannian Curvature
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B Gravitational Mass of C/2 Objects: Jim Adrian's Inquiry
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B Explore Time Perception & Relativity - Get Your Answers Here
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I Vanishing of Contraction with Metric Tensor
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B How Do Lorentz Transformations Explain Time Dilation in Special Relativity?
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A Unlearning Block Universe: BU vs Presentism Q&A
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I Static Point in de Sitter-Schwarzschild Spacetime
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I Metric defined with a non-coordinate basis
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B Can time pass slower on another planet, causing the Twin Paradox?
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B Backwards Time Travel: Can We Influence Our Casual Past?
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I Gravitational Wave Creation: Is a Stationary Wave Possible?
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B Calculating Relativity of Simultaneity
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A Kerr Black Hole Angular Momentum Limit
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B Time Dilation & Relativity: Explained for Beginners
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I Proper Velocity: Intro to Elementary Particles
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I Lorentz Invariance Violation for Manifolds
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What Happens to Laser Light Inside a Spaceship Traveling at Light Speed?
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I Differential form of the velocity equation in a non-standard configuration
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B How does an isolated observer know if they're accelerating?
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B Gravitational Lensing & MOND: Does DM Explain Observations?
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B Length contraction and Time dilation calculation
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A Can you numerically calculate the stress-energy tensor from the metric?
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B Matter & Space-Time: A Discussion
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I Four Velocity Vector: why divide by time according to the particle?
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I Zero-Energy Universe: Reliable Source?
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I Treatment of Relativity in "Las Leyes de la Termodinámica" Movie
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B What Would You Experience Inside a Black Hole and How Does Time Behave?
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B Does Gravity Act on Everything? Fundamental to GR?
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I Falling EM system contradicts the equivalence principle?
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I Understanding Microcausality in QFT
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I Is x Equal to x' and t Equal to t' in Lorentz Transformations?
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I Rotation and Boost of Tensor Components: Meaning?
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I The proper Schwarzschild radial distance between two spherical shells
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B Query about Pound-Rebka like experiment
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I Can We Practically Measure the Gravitomagnetic Effect with Spinning Cylinders?
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I Question re spacial curvature K(r) w/r/t the Shwarzchild metric
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I Understanding how to derive the relativistic-relative velocity formula
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I Parallel transport vs Lie dragging along a Killing vector field
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B Accelerate Light-Clock Simulation: Proper Time & Coordinate Time
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I Hyperbolic Geom of Minkowski Space: Chung et al. 2009
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A How Does Visser Derive Schwarzschild Geometry from Minkowski Space?
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I Transformations of Electromagnetic Fields: Griffiths' Claims
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B Descending a Rotating Black Hole: Hit the Ring Singularity?
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B Why is "time orthogonal to space" in inertial reference frames?
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A Solving Jackson's 3rd Ed. Equations Involving A, L and g
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B Can Universe Be Decelerating in Time?
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A Curvature Tensor for Dual Vectors
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B Descending a Black Hole: Spaghettification or Compression?
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I Lorentz transformation of the "bilinear spinor matrixelement"
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A Constant Scalings of 4-Vectors" - Zweibach, 2nd Ed.
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B Deriving Lorentz Transformations with 3 Postulates
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B Solving Doubts about Simultaneity Exp. in Special Relativity
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I Choice of signature important for superluminal 4-velocity? (Minkowski)
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A Understanding Killing Vector Equation Notation
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I Null Spacetime Intervals and Quantum Superposition
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Insights Is Pressure A Source Of Gravity?
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I Study After Schwarzschild Spacetime: What's Next?
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I Gravitational time dilation using an accelerating light-clock
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I Light-Cone & 4-Vector Properties
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I Spacetime Interval & Energy-Momentum 4Vec: Reconciling Hyperbolic Geometry
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A Can R. Mallett's Device Overcome Energy Challenges for Time Travel?
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B How Many Reference Frames Can Be Coincident at the Origin?
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A Understanding how to derive the stress-energy tensor formula
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I Testing Gravitomagnetic Effect: Max Practical Results
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B The Missing Mass of a reaction
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B Unlearning the Block Universe: How Relativity Challenges Our Perception of Time
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I Mass distribution behavior of the singularities during black hole mergers
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I Interactive Spacetime Diagrams: Get Feedback on What I Built
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B Rookie question about proper time
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I Why Can't Objects Travel Faster Than Light?
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I How to Incorporate Metric Coefficients into Worldline Plots in Curved Spacetime?
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I What Are the Physical Properties of Human-Sized Worm Holes?
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I Understanding Relation of Proper & Vector Quantities
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B Gisin's ideas on time vs. special relativity—how does one reconcile them?
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I Relative Velocity of Particle ##p##: S vs S
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I Lorentz boost -- speed or velocity?
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I Addition of Cosmic Velocities: Expansion Equation & Horizons
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I Electromagnetic field according to relativity
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B Is E=mc² the Formula for the Speed of Light?
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I Does direct interparticle action imply advanced inertial forces?
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B Is there a thought experiment to show that the speed of light is constant?
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B Time Travel Equation for Case B
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B Time & Speed of Light: Not a Universal Constant
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I Understand Spacetime Diagrams: Calculating Proper Time
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I Find Einstein's Field Equation - Intuition with Strong Equivalence Principle
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I Touch & Relativity: What Does It Mean?
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A Understand Linear Perturbations to Stationary Black Holes
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I Length Perception & Spacetime Warp: Is it Warped?
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I Mathematical Truth of Physically Observable Quantities
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I Proof that two timelike vectors cannot be orthogonal
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I Four-Velocity: Geometric Definition
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I Affine Space: Understanding the Difference from Ordinary Space
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B Learn Special Relativity: Understanding Graphs for X-T System
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B Interpreting Lorentz Transformation Rotations
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I Trying To Calculate Christoffel Symbols
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I Find Experimental Results for Physics Project
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B Bending of Spacetime: Time Delay?
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I The magnitude of a four velocity
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What is the significance of the TL interval square measurement in relativity?
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B 2 objects at 0.6c in opposite directions. Can outrun light?
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