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 What does comoving mean and how is it related to isotropy?
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Undergrad Derive Lorentz Transformation by Visualizing Space-Time Coordinates
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Undergrad GR for a mathematician and a physicist? What's the difference?
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Undergrad Does de Sitter Spacetime Have Flat Foliation?
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Undergrad Einstein vs Newton: The concept of inertial vs non inertial frames
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Undergrad Create Black Holes with Warping EM Fields: Feasible?
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Undergrad Detonator Paradox" Re-Cast: Can a Thin Wire Prevent a Bomb?
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Undergrad Solve Constant Acceleration Problem in Special Relativity
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Undergrad How Do Jacobi Fields Explain Tidal Forces in General Relativity?
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Undergrad Argument for Existence of Normal Coordinates at a Point
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Undergrad Is a Merry Go Round Floating in Space an Inertial Frame of Reference?
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Undergrad Mass Unit in General Relativity
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Undergrad Dark energy questioning Relativity?
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Undergrad Metric Tensor: Symmetry & Other Constraints
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Undergrad Effective Potential & Curved Spacetime: Angular Momentum Effects
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Undergrad Questions about spaghettification and gas cloud G2
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Undergrad What is the nature of space and time in deep empty regions of the cosmos?
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Undergrad Computing Riemann Tensor: 18 Predicted Non-Trivial Terms
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Undergrad Length Contraction: Traveling in a Space Ship
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Undergrad Vanishing of Contraction with Metric Tensor
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Undergrad Static Point in de Sitter-Schwarzschild Spacetime
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Undergrad Metric defined with a non-coordinate basis
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Undergrad Gravitational Wave Creation: Is a Stationary Wave Possible?
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Undergrad The Non Constant Gravitational Constant (G)?
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Undergrad Proper Velocity: Intro to Elementary Particles
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Undergrad Lorentz Invariance Violation for Manifolds
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Undergrad What Happens to Laser Light Inside a Spaceship Traveling at Light Speed?
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Undergrad Differential form of the velocity equation in a non-standard configuration
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Undergrad Four Velocity Vector: why divide by time according to the particle?
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Undergrad Zero-Energy Universe: Reliable Source?
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Undergrad Treatment of Relativity in "Las Leyes de la Termodinámica" Movie
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Undergrad Falling EM system contradicts the equivalence principle?
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Undergrad Understanding Microcausality in QFT
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Undergrad Is x Equal to x' and t Equal to t' in Lorentz Transformations?
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Undergrad Rotation and Boost of Tensor Components: Meaning?
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Undergrad The proper Schwarzschild radial distance between two spherical shells
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Undergrad Can We Practically Measure the Gravitomagnetic Effect with Spinning Cylinders?
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Undergrad Question re spacial curvature K(r) w/r/t the Shwarzchild metric
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Undergrad Understanding how to derive the relativistic-relative velocity formula
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Undergrad Parallel transport vs Lie dragging along a Killing vector field
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Undergrad Hyperbolic Geom of Minkowski Space: Chung et al. 2009
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Undergrad Transformations of Electromagnetic Fields: Griffiths' Claims
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Undergrad Lorentz transformation of the "bilinear spinor matrixelement"
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Undergrad Choice of signature important for superluminal 4-velocity? (Minkowski)
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Undergrad Null Spacetime Intervals and Quantum Superposition
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Undergrad Study After Schwarzschild Spacetime: What's Next?
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Undergrad Gravitational time dilation using an accelerating light-clock
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Undergrad Light-Cone & 4-Vector Properties
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Undergrad Spacetime Interval & Energy-Momentum 4Vec: Reconciling Hyperbolic Geometry
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Undergrad Testing Gravitomagnetic Effect: Max Practical Results
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Undergrad Mass distribution behavior of the singularities during black hole mergers
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Undergrad Interactive Spacetime Diagrams: Get Feedback on What I Built
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Undergrad Why Can't Objects Travel Faster Than Light?
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Undergrad How to Incorporate Metric Coefficients into Worldline Plots in Curved Spacetime?
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Undergrad What Are the Physical Properties of Human-Sized Worm Holes?
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Undergrad Understanding Relation of Proper & Vector Quantities
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Undergrad Relative Velocity of Particle ##p##: S vs S
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Undergrad Lorentz boost -- speed or velocity?
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Undergrad Addition of Cosmic Velocities: Expansion Equation & Horizons
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Undergrad Electromagnetic field according to relativity
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Undergrad Does direct interparticle action imply advanced inertial forces?
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Undergrad Understand Spacetime Diagrams: Calculating Proper Time
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Undergrad Find Einstein's Field Equation - Intuition with Strong Equivalence Principle
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Undergrad Touch & Relativity: What Does It Mean?
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Undergrad Length Perception & Spacetime Warp: Is it Warped?
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Undergrad Mathematical Truth of Physically Observable Quantities
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Undergrad Proof that two timelike vectors cannot be orthogonal
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Undergrad Four-Velocity: Geometric Definition
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Undergrad Affine Space: Understanding the Difference from Ordinary Space
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Undergrad Trying To Calculate Christoffel Symbols
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Undergrad Find Experimental Results for Physics Project
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Undergrad The magnitude of a four velocity
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Undergrad Are Basics of Cosmology Difficult to Grasp?
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Undergrad How Elastic is Space (Spacetime)? | LIGO & Gravitational Waves
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Undergrad What does E(nergy) = m(ass) (times c^2) mean?
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Undergrad Area & Volume Naming Conventions: 4 Questions
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Undergrad Penrose Singularity: Trapped & Anti-Trapped Surfaces Explained
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Undergrad Four-Vector in Spacetime: Invariance Across All Reference Frames?
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Undergrad Using AI for Gravitational Wave Generation
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Undergrad Frame Dragging Around Spinning Black Holes: Implications
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Undergrad Is the Sagnac Effect a Relativistic Phenomenon?
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Undergrad Who Will Win the Race at the Event Horizon?
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Undergrad An event being in the past of a timelike separated one
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Undergrad Invariance of Diff. Line Elems. in Hartle's Gravity: Intro to GR
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Undergrad Exact historical explanation of deducing speed of light constancy
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Undergrad Relativistic Work-Energy Theorem: Deriving Griffiths' Formula
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Undergrad How Do You Derive the Distance Formula for a Hyperbola?
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Undergrad Gravitational time dilatation and curved spacetime - follow up
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Undergrad Parallel Transport & Geodesics: Explained
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Undergrad Why do clocks show proper time?
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Undergrad Can We Confine Energy to Create Microscopic Black Holes?
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Undergrad Will anti-parallel light beams between two stars stay parallel?
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Undergrad Cosmology: Inertial Reference Frames & Misconceptions
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Undergrad Measuring One-Way Anisotropy of Light Speed
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Undergrad Speed of Light in Vacuum in Non-Inertial Frame
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Undergrad What is the meaning of constant speed of light?
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Undergrad Solving Confusion About Black Holes, Schwarzschild Radius & Time Dilation
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Undergrad What are the Relativistic versions of Jefimenko's equations?
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Undergrad Solving Geodesic Eq.: Mysterious Conservation Eq. (Sec. 5.4 Carroll)
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Undergrad What are the many null-infinities in Minkowskian space?
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