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 Time Measurement in MT Traversable Wormholes - Help Needed
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I How Does Lorentz Theory Address the Concept of Velocity Becoming Zero?
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B Positive Energy Theorem Explained in Layman Terms
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I General Relativity & Curvature Explained: How Objects Fall
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I Speed of Light: Measuring Meters and Seconds
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I Gravity: Exerting Force or Warping Spacetime?
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I SXS Gravitational Wave Data: Initial Conditions Explained
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I Nash embedding theorem & curved spacetime
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B Fishing in a Black Hole: Can It Be Done?
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I Parallel transport of a vector on a sphere
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I Can One Observe Anything Falling Into a Black Hole?
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A Solving Covariant Derivative Notation Confusion
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B Can Info Travel FTL? Understanding Speed of Information
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B Help! Solving Einstein's Length Contraction Problem
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I Is General Relativity More General than Gravity?
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I Escape Velocity, Gravitational Velocity & Time Dilation
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I Derivative consisting Levi-Civita
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I Lorentz Boosts: Finding Speed, Coordinates & Rotation w/ Matrix Multiply
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A Meaning of the word "conserved" in relativity
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A Solved: Velocity of Isolated System in Different Inertial Sys.
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I Planck Length & Singularity: Point or Sphere?
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B Lightwatch/Lightclock (Lichtuhr)
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I Observation of matter falling into Black Holes
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B Infinite Curvature & Hawking Radiation Explained
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B What Would Light Look Like If Train Moved at > Speed of Light?
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I GR: Clarifying Different Forms of the Metric for Self-Studiers
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B Clarification on Length Contraction
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I Do These Equations Hold True Beyond Special Relativity?
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B S5-HVS1: 10x Slower Relative Time?
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B Linking Quantum Physics and Relativity: Theory of Everything?
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I Basic questions about raising and lowering indices
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I Solving Differential Equations in General Relativity
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I Summation Convention in Einstein Notation
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B Elasticity of Spacetime: Does Spacetime Stiffen?
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B How Does LIGO Detect Gravitational Waves Despite Changes in Spacetime?
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B Energy, Mass, Light: Unveiling the Relationship
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A Derivatives of Lagrangian Terms: Why We Lower?
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I Difference between 1. & 2. Kind Cristoffel Symbols
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I Special Relativity: Comparing Lengths in Parallel Motion
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A Lorentz Transformation: Wave Equation vs. Interval Invariance
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I Conservation of Energy Momentum Tensor
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I Minkowski Metric: When to Use It
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I Predicting Local Arrival Time w/ Rocket Ship Clock & Accelerometer
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B Can an object in every frame of reference have zero velocity?
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I Raising/Lowering Metric Indices: Explained
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I Architecture & Assumptions of General Relativity Theory
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A Why does this term transform in this way?
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B How to understand 'covariance' and 'contravariance'
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B Size of Bullet Hole: Comparing 0.000001c & .9c
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I What if a body loses 86,6% of its mass as couples of gamma photons?
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I How specifically does an accelerated uniform rod Lorentz contract?
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I Flux of i-momentum: Is it Correct?
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A Can Ricci Flow be Used in Lorentz Manifolds?
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B Landau's Derivation of Lorentz Transformations: Questions Answered
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I Time Dilation, Length Contraction & Massive Bodies
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I Gravitational wave interactions and the equivalence principle
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B Length Contraction in Accelerated Frame
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I Electromagnetic Potentials in Relativity: Retarded Potentials?
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B Special case of relativistic velocity addition law
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I Lorentz transformation for 3 frames (2 dimensions)
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I Gravity as Curvature of Spacetime: Understanding Einstein's Theory
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NASA hypothetical engine w/ relativistic ions
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I Violations of Energy Conditions for Metric in Relativist's Toolkit
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I Connection between General Relativity & Chaos Theory?
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I Christoffel's symbols: symmetry in the two (lower) indices
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B What Would You See Inside a Black Hole? | General Relativity
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B Red-Shifted Light: Speed Less Than C?
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I Active Diffeomorphisms of Schwarzschild Metric
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A Numerically Solving Scalar Propagation in Curved Spacetime
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B Why is the speed of light limited?
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B Understanding Spacetime Diagrams
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I Photon Speed Addition: Can it Be FTL?
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B Train traveling near light speed
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I Does Moving a Wire Increase its Magnetic Field?
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I Energy-Momentum Tensor: How Much Do University Students Learn?
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I Can Lagrangian mechanics be applied to motion in an expanding universe
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I Why Stationary Masses Attract: Explaining GR Intuition
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I The Equivalence Principle as a Starting point of GR
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B Relative Nature of Speed: Einstein and Orbits
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I How time dilation is a permanent change and length contraction not?
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I Time travel to the Andromeda Galaxy
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I Transformation of the Christoffel Symbols
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I Derivation of the conservation of total energy and momentum
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I Wiki definition of Fermi coordinates
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B How Can Photons Contribute Mass to a Container?
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B Does Gravitational Time Dilation Affect How We Measure Time on Earth?
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I What is the ambiguity surrounding coordinate differentials in Relativity?
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I Special relativity vs Lorentz invariance
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I Parallel Transport: Uses & Benefits
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A Cooling of Identical Bodies in SR: A Peculiar Situation
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I Time Dilation: Relative to Medium or Vacuum?
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I Metric compatibility and covariant derivative
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I Derivation of an identity for ##\partial^2_t \int T^{00}(x^i x_i)^2d^3
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Insights Relativistic Treatment of the DC Conducting Straight Wire
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I Aberration of Light in Circular Motion: Does Distance Change?
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I The solution of a nonlinear equation in Schutz's book page 211 2nd edition
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I ADM Formalism: Intro-to-Intermediate Explanation
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I Time Dilation, Mass-Energy Equivalence: Implications for Time Passage
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I Speed of Light Paradox: Neutron Star Rotation Rate
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B The Strong Energy Condition in General Relativity
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