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 What is the Bridge Fall Paradox and its implications for material stress?
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High School Is Euclid's 5th Postulate Correct? - A Teacher's Perspective
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High School What is the theory of relativity?
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High School Pulsar Clock: The Mystery of Slowing Rotation in a Spaceship
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High School Light cone and Cherenkov radiation
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Undergrad Issues with the variation of Christoffel symbols
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Undergrad Examples of invariant quantities
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Undergrad Universe Inside Black Hole: Principles Different?
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Graduate Physical Basis of Lovelock's Theorem: GR & Equivalence Principle
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Undergrad Is there any way to derive the time dilation formula?
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Undergrad Riemann curvature tensor derivation
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Graduate Explaining the Geocentric Celestial Reference System
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Undergrad Deriving Covariant Form of $E_{1}E_{2}|\vec{v}|$
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Undergrad Why doesn't a photon's mass increase to infinity?
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Undergrad How do non-inertial frames affect special relativity?
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Undergrad Geometric Meaning of Complex Null Vector in Newman-Penrose Formalism
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Graduate Hawking radiation and rotating Black holes
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Graduate Space Travel & Relativity: Is it Possible?
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High School Acceleration: Effects on Matter & Observers
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High School Einstein's Gravity Model: Explaining Its Creation
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High School Is Mass Truly Relative or Absolute?
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High School FTL train + FTL communication thought experiment
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High School Constancy of the speed of light
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Graduate Gravitational Waves: Expansion of Spacetime?
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Graduate Compute Normal Forces on Box Sides via Stress-Energy Tensor
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Undergrad Can Newton's Theory Apply in a Small Volume?
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High School Tensors & Lorentz Transform: Is There a Connection?
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Undergrad A moving rod; two Lorentz boosts compared with one
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Undergrad Charged Particles Radiating in "Free Fall" into Black Holes
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Undergrad Rotating Black Hole w/ Ring: Spacetime Effects
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Graduate When does the Minkowski metric get non-zero off-diagonals?
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Undergrad The metrics to describe a wormhole
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Undergrad Spacetime is homogeneous and isotropic
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Undergrad The relativistic de Broglie equation
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Undergrad Why does bent space set objects in motion?
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High School Theoretical Question On The Twins Paradox and Heart Rate
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Undergrad Expressing Locality in Vector Space for GR
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Undergrad Basis Vectors & Inner Product: A No-Nonsense Introduction
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Undergrad Radial Acceleration of Rotating Singularities: Planck Length & Beyond
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Undergrad Lie Algebras & Relativity: Usefulness & Purpose
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High School Time Dilation: "Did I Use Formula Correctly?
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Undergrad What is the difference between covariance and invariance in special relativity?
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Graduate Rocket Motor Placement SR: Effects on Spaceship Acceleration
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Undergrad Modeling Simple N-body in Hypothetical Relativistic Dark Flow w/ Netlogo
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High School Object interactions in relation to space curvature....
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Undergrad Did the big bang singularity not have a history?
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Undergrad Time dilation vs the Equivalence principle
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High School Exiting Wormhole Prematurely: Where Does Your Ship End Up?
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High School Is Gravity a Fundamental Force or an Emergent Effect?
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Undergrad A paradox connected to General Relativity
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Undergrad Accuracy of Relativity vs Quantum Mechanics Measurement
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High School Gravitational Mass & Velocity: Is There a Correlation?
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Undergrad Tangible example of relativity of simultaneity
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Undergrad A minus sign in the gravitational potential
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High School Understanding Orbital Geodesics in General Relativity
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Undergrad Del with Superscript in Carroll's Equation
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Undergrad Number of Geodesics Between Two Points: Topology vs. Homeomorphism
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Undergrad Modified Schwarzschild Metric: Length Contraction Consequences
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Undergrad Interesting Derivation of Maxwell's Equations
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Undergrad Can we deal with relativistic mass once and for all?
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Graduate Usefulness of relativistic mass
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High School Understanding Resistance of Acceleration: Velocity & Force
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Insights What is relativistic mass and why it is not used much? - Comments
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High School Flat spacetime in a gravity well
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Undergrad Geodesic Maximality: Answers to Relativists' Questions
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High School Distance Expansion When Moving Away from an Object?
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High School How can the speed of light be constant for all observers?
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Undergrad Does Rest Mass Change if c Varies?
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High School LIGO Observation of Gravitational Waves: Questions Answered
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High School Speed of Light: Does It Change?
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Graduate Math of Reference Frames: Spanning Vector Space
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Undergrad Simultaneity: Train and Lightning Thought Experiment
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High School Length contraction applet - have they got it wrong?
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High School What speed and direction are we actually traveling?
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High School How can I derive the law of composition of velocities?
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Graduate Who Was Right - Poincare, Einstein or Neither
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Undergrad Lorentz Transformation Matrix: Tensor of Order 2?
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Undergrad Some geometry questions re Schwarzschild metric
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High School Mass and Time Dilation: Causes and Effects
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Graduate Riemannian Geometry: GR & Importance Summary
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Graduate Prove 2-D Lorentzian Metric is Locally Equivalent to Standard Form
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High School Why can't light travel faster than c?
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Undergrad Black Hole Radiation: Questions Clarified
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Undergrad Theory of Acceleration: Is There a Limit?
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Undergrad Find Solutions to Helical Worldline's Surfaces of Simultaneity
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Undergrad Weight of a relativistic particle
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Undergrad Why is the conservation of electric charge expressed in the continuity equation?
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Graduate Compute Commutator of Covariant Derivative & D/ds on Vector Fields
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High School Newton's Law of Gravitation: Balancing Centrifugal Force & Internal Pressure
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Undergrad Delta Notation in GR: Replacing vs Raising/Lowering
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Undergrad De Sitter Universe: Divergent Parallel Lines?
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Undergrad Light From Black Holes: GR vs QM
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Undergrad Event Horizons - Holographic Principle
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High School Lag of a clock coming back to its initial position (Twins Paradox)
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Graduate Dark Matter, Energy-Momentum Tensor & Galaxies
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Undergrad Latest Gamma Ray Burst Experimental results
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Undergrad Can anyone help me understand the Equivalence Principle
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Undergrad Metric Measurements: Explaining dx vs adx
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Undergrad Black hole event horizon confusion
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High School Gravitational Lensing: Gravity's Effect on Light
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