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 Rookie question about proper time
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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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High School Gisin's ideas on time vs. special relativity—how does one reconcile them?
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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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High School Is E=mc² the Formula for the Speed of Light?
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Undergrad Does direct interparticle action imply advanced inertial forces?
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High School Is there a thought experiment to show that the speed of light is constant?
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High School Space + time = space time? then....
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High School Time Travel Equation for Case B
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High School Time & Speed of Light: Not a Universal Constant
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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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Graduate Understand Linear Perturbations to Stationary Black Holes
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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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High School Learn Special Relativity: Understanding Graphs for X-T System
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High School Interpreting Lorentz Transformation Rotations
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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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High School Bending of Spacetime: Time Delay?
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Undergrad The magnitude of a four velocity
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Graduate What is the significance of the TL interval square measurement in relativity?
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High School 2 objects at 0.6c in opposite directions. Can outrun light?
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Insights Slowly Lowering an Object in a Static, Spherically Symmetric Spacetime
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High School Particle with negative mass inside a black hole horizon
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Graduate Metric Form of ##g_{μν}## - Solving a Challenge
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Undergrad Are Basics of Cosmology Difficult to Grasp?
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Graduate Stats on Students Understanding Theory of Relativity
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High School Relativity & Computer Calculations: Speed Up 300x?
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Undergrad How Elastic is Space (Spacetime)? | LIGO & Gravitational Waves
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High School Length Contraction Thought Experiment: Spot Mistake/Wrong Assumption
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High School Gravity & Dark Energy: Newton, Einstein & Beyond
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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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Graduate LT & Translation Symmetry: Problem Analysis
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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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Graduate Transformation law of the energy momentum tensor
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High School Measurement of an unknown velocity vector of a closed space
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High School Is the current definition of gravity accurate?
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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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High School Expanding Universe: How Does It Conserve Energy?
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Undergrad Invariance of Diff. Line Elems. in Hartle's Gravity: Intro to GR
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High School Accurate measurement of the speed of light
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High School Who will win this running race?
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High School What is the speed of a photon traveling along the sine function?
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Undergrad Exact historical explanation of deducing speed of light constancy
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High School A thought Experiment in Time Dilation
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High School Mass, Energy, and Space-Time: How Do They Interact?
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High School Question about speed connection
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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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Graduate Proving Free-Fall in Rindler Spacetime is Finite
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Undergrad Will anti-parallel light beams between two stars stay parallel?
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High School Synchronization free of Contradiction: 1905 Paper
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Graduate Can large Black Holes ever spaghettify? (and more)
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Undergrad Cosmology: Inertial Reference Frames & Misconceptions
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Graduate Second Order Metric: Manipulating & Calculations for Einstein Equations
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Undergrad Measuring One-Way Anisotropy of Light Speed
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High School Falling Clock & Black Hole: Measure Time or Disappear?
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High School Velocity Addition: Unraveling the Mystery
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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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Undergrad Understanding Killing Vectors & Schwarzschild Geodesics
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Graduate Understanding Christoffel symbol in GR context
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Graduate Non-metric Compatible Connections: Physically Plausible?
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High School Einstein-Poincare Clock Synchronization Convention
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High School Scale of Measurement vs Equipment Sensitivity: Does Symmetry Always Hold?
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Undergrad Question on the energy needed to go at a relativistic speed
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Undergrad Did Einstein Formulate an Aberration of Light Using Tangents?
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Undergrad Strongest Evidence for Trapping Light in Schwarzschild Radius
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Graduate Orthogonal spacelike and timelike vectors and inertial frames
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Graduate Is 'Local Flatness' the Right Term for Describing Spacetime?
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Undergrad Big Bang Theory: Spacetime or Matter First?
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High School Constant speed between 2 objects close to the speed of light
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Undergrad Is the Scale Difference Between E=pc and v=E/p Explained by Special Relativity?
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Undergrad Comparing Planck's Mass, Length, Time and Energy
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Undergrad How can Lorentz transforms be inverted?
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