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