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 Linear Accelerator Length Contraction
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High School Harold White's Warp Drive Research: Casimir Effect Insight?
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High School Adorable Gravity Demo - National Medals Lab
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Undergrad Gradient as vector vs differential one-form
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Graduate Characterizing GR Traj in Minkowski Space
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Undergrad Double Pulsar: 16 Year Study Validates Relativity
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Undergrad Global simultaneity surfaces - how to adjust proper time?
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Graduate General Relativity: Section 5.1 Homogeneity & Isotropy Analysis
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Undergrad SR "Paradox" Thread Continuation: Tilt of Plates & Simultaneity
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Graduate B and A in Curved Space Time: Does \nabla \times A =B?
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High School Solving the twin paradox with special relativity
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Undergrad Time Dilation at Moving Black Hole Event Horizon
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High School Explaining a Stronger Relativity Paradox than the Twin Paradox
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Undergrad LIGO: Detecting Differences Less Than a Proton Length - How is It Possible?
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High School Special Relativity & Lorentz Transformation Q: Clock C2 Reading?
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Graduate Re-writing the geodesic deviation eqn in matrix notation (3d only)
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High School What experiments confirmed the constant velocity of light?
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Undergrad Can I get a clarification on my misunderstanding of SR?
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Undergrad Equations Using Comma-Goto-Semicolon Rule in Curved Spacetime
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High School Einstein's train-lightning scenario doesn't demonstrate relativity
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Graduate Einbein as Lagrange Multiplier: How Does it Work?
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Undergrad Does light escape the Universe?
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Graduate Differential equation for affine parameter
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Undergrad Kerr Metric Bibliography: Resources for Timelike Geodesics
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High School Calculating Energy Loss of Muon Moving Through a Medium
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Graduate Energy, mass and Noether’s theorem
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Undergrad Are Geometric Points Affected By Forces?
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Undergrad Time Dilation vs. Doppler Effect: Similarities & Differences
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Undergrad Is movement really relative or absolute?
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Undergrad Do Photons Attract Each Other?
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High School The Mini Rocket Experiment: A Test of Einstein's Equivalence Principle?
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High School Spatial curvature around a spherically symmetric mass
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Undergrad Piecewise Functions in the Einstein Field Equations
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Undergrad Sufficient Conditions for Strong Cosmic Censorship
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Undergrad Can Placing Earth Between 3 Black Holes Slow Down Time?
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Undergrad Simplification of Dark Matter effects
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Graduate Einstein Field Equations: Spherical Symmetry Solution
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Undergrad What if Einstein equivalence principle is proven wrong one day?
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High School Time Travel: Is It a Meaningless Concept?
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Undergrad Comparing Spacetime and Thermodynamic State Space Manifolds
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High School General Relativity as a Challenge for Physics Education
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Undergrad Reference frame vs coordinate system
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Undergrad On the gravitational collapse of a massive shell
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Undergrad If one of the dimensions of our solar system contracted ....
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Graduate Flat Embedding of Our Universe: Questions & Answers
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Undergrad Do we know how many meters long one second is?
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Undergrad What happens to time on the hands of a clock?
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High School Special Relativity and Light -- How does speed of an object affect time?
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Undergrad Understanding Special Relativity and Coordinates
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Undergrad Do Physicists Literally Believe We Move Through Time?
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Undergrad Universal Block Theory: Free Will
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High School Proving Special Relativity w/ Standard Equipment
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High School Confused about time dilation and cosmic speed limit
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Graduate Sign of Curvature in Flamm's Paraboloid: Negative?
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High School One way speed of light in one reference frame measurement
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Graduate Question on Equation in Zee's Gravity in a Nutshell P107
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High School Finding One-Way Speed of Light: Use One Clock
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Undergrad Could Tachyons Discredit Relativity?
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High School Black Holes: Can Anything Reduce Their Size?
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Undergrad Lorentz Invariance of Q in Weinberg: Justifying Transformation
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Graduate Unruh & Minkowski Modes: Analytic Extension Explained
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Undergrad Gravity: Force or Acceleration?
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Graduate Is gravity simply an interaction in the gauge theory of gravity?
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Graduate Prove Fermi-Walker Transport of Gyroscope's Spin Vector w/No Applied Moment
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Undergrad Normalization Constant in Einstein-Hilbert Action
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Undergrad Falling into a Black Hole: Blueshift Questions Explored
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High School FAQs about Bobrick & Martire's Warp Drive & Lentz's Paper
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Undergrad Do Fictitious Forces Still Matter in General Relativity?
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Undergrad Linearized Gravity & Metric Perturbation when Indices Raised
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Undergrad Variation of Four-Velocity Vector w/ Respect to Metric Tensor
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Graduate Merger of Extremal BHs Causes Naked Singularity?
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Graduate Tony Rothman Questions E=mc^2 in American Scientist
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High School Paradox in the block universe interpretation
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High School Time Dilation: How Does Speed Affect Aging?
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High School I have a few questions about Warp drives? I am a layman.
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High School Understanding Entangled Particles in Different Time Frames
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Undergrad Black hole inside of a black hole.... can it be done?
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Undergrad Clarification on Rindler coordinates definition
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Undergrad The Universe filled with a "homogeneous perfect fluid"
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High School Do black holes determine time's arrow?
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Undergrad A problem with the solution to the ladder paradox
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High School Basic introduction to gravitation as curved spacetime
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Undergrad Is the sign of the Einstein equation right in Chandrasekhar's Black holes?
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High School Can we see matter crossing the Event Horizon with a powerful telescope?
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Undergrad Assumption in the derivation of the Lorentz transformation
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High School Gravitons: Relationship to Space-Time & Black Holes
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High School Is length contraction (Lorentz transformation) an illusion or real?
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Undergrad Understanding Jacobian Matrix Transformation in Special Relativity
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Undergrad Definition of Rindler Horizon: A Global View
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Undergrad Absolute meaning of spatial deviaton angle of light around the sun
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Graduate Rindler Horizon Subtleties: Advanced Discussion
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Undergrad Bondi ##k##-factor concept from first principles
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High School Equivalence Principle and Rindler Horizons
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Insights Geodesic Congruences in FRW, Schwarzschild and Kerr Spacetimes
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High School Free fall floating in a closed spaceship near a gravity source
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High School Distance Length Contraction at Light Speed
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Undergrad Observer Inside Collapsing Shell
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Undergrad Reference Frame, Difference in Kinetic Energy, Fuel Consumed
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High School Why does it require an infinite amount of energy to reach the speed of light?
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High School Is there an inside to a Black Hole?
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