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 Relativity of Simultaneity and frames
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High School Time dilation problem question
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Undergrad Question on §3 of Einstein's 1905 paper
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Undergrad Is Causality Relative in Black Holes?
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Undergrad Strange Spacetime behavior inside Event Horizon
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Undergrad Do laws of physics apply below the event horizon?
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Undergrad Connection between Foucault pendulum and parallel transport
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High School Relative speed between Galaxies
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Undergrad Detecting Gravitational Waves: Is My Understanding Wrong?
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Graduate How was the value of the spacetime curvature obtained?
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High School Traveling to nearest star at nearly the speed of light
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Undergrad Why doesn't the Earth's radius change while the surface accelerates?
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Undergrad Two twins moving towards each other in a circular orbit
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Graduate Physical meaning of open set on manifold
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Undergrad Is it possible to distort a black hole's event horizon
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Undergrad Relativity's "time dilation" or clock accuracy alteration
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Undergrad Explaining Different Types of Time in Relativity
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High School Can Understanding Spacetime Lead to Time Travel?
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Undergrad Christoffel Symbol vs. Vector Potential
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Undergrad What does it take to spaghettify?
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Undergrad Is the Age of Our Universe Affected by the Speed of Time at the Big Bang?
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High School Curved line shortest distance between two points?
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Undergrad Why not find mass increase in a simple way?
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Undergrad Help Deriving Relativistic Momentum Equation 3.9
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Undergrad Solving Length Contraction Paradox
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Undergrad Null geodesics in Schwarzschild spacetime
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Insights The Schwarzschild Geometry: Part 4 - Comments
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High School Gravitational lensing thought experiment
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High School If the Sun disappeared, would the Earth continue to orbit?
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High School Can you reverse Einstein's famous E=mc^2 equation?
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Graduate Einstein's Field Equations: "Smoke Ring" Solution?
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High School Black Hole Collision: What Happens When a Large Swallows Smaller?
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Undergrad Einstein's Equivalence Principle.
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Undergrad Misner Solution Line Element | Einstein Field Equations
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Undergrad Relativity of simultaneity -- an example in D.Morin's book
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Undergrad Velocity Addition Example: Morin's Confusing Use of Equation
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Undergrad Gravitational Redshift: Derivation from Static Metric
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High School Why Need Covarient Form of Electrodynamics?
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High School Time dilation and thermodynamics
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Graduate Reference for coordinate view of equations of motion
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High School Bending of light in a gravitational field
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Undergrad Is a 2-body elliptical orbit stable in GR?
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Graduate Train thought experiment confusion
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Graduate How is the invariant speed of light enocded in SL(2,C)?
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Graduate Interpretation of Derivative of Metric = 0 in GR - Learning from Wald
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High School Maxwell's equations and gravitation
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Graduate Contraction between Levi-Civita symbol and Riemann tensor
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High School How would the solar system appear if you approached at near c?
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High School Photography in 4D World: Time & Space
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Undergrad Collision in special relativity
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Undergrad Understanding the Einstein Train Thought Experiment: Scenario Comparisons
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Undergrad Two metric tensors describing same geometry
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Undergrad Deriving distances from reference frames
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High School Length Contraction equation derivation
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Undergrad Is mass conserved in relativistic collision?
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Graduate Pontryagin densities and Chern-Simons form
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Undergrad Why was time dilation under GR a new concept?
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Undergrad Special relativity and inertial frames
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High School Special relativity and sequence of events
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High School Earth time dilation vs Sun time dilation
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High School Flat Universe: What Does It Mean to be 3-Dimensional?
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High School Information traveling faster than light
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Undergrad A good reference sheet/manual about Einstein index notation?
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Undergrad Mass in Special Relativity: Misconception or Reality?
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Insights The Schwarzschild Geometry: Part 2 - Comments
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High School Could gravity be used to send light speed signals?
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Undergrad Deriving the FLRW Metric: 4D Euclidean Space Needed?
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High School Can we take a shrinking frame of reference?
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Graduate Non static and isotropic solution for Einstein Field Eq
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Undergrad Mercury Precession and the Hypothetical Oblate Sun Model
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High School Solving Ambiguity in QFT in Curved Spacetime
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High School Is a Rocket at Light Speed Truly Infinite Mass?
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Undergrad Coordinate vs. Non-Coordinate Basis in General Relativity
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High School Confused about how long it takes to cross an event horizon
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Undergrad Unifying gravity and quantum mechanics
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Undergrad Is the Contraction of a Mixed Tensor Always Symmetric?
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High School Speed of Light at near C speeds
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High School E = mc^2, Wikipedia Mass–energy equivalence Clarification
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Undergrad What happens when two light beams approach each other.
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Graduate Relativity in Complex Analysis: Is There a Formulation?
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High School Solving Field Equations & Schwarszchild Metric
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Undergrad Velocity 4-Vector for Light Ray
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Undergrad Understand Shape of Universe: Spatially Flat?
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Undergrad The Curious Case of White Holes: Unraveling the Mysteries of Spacetime Curvature
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High School General relativity vs. Newtonian gravity
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High School Does Graphene Have Infinite Mass?
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Undergrad Something I noticed about Doppler asymmetry
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Undergrad Maxwell's Eqs. & Tensor Notation
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High School Black Holes: Questions on Event Horizon Observer
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High School Inside a Black Hole: Rest Frame & Singularity
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Graduate Mastering General Relativity: Student Experiences
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Undergrad Quantizing Fluid Mechanics & Gravity: A Debate
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Graduate Nonvanishing Torsion: When Does It Occur?
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High School Is this the reason why time slows down as speed increases?
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High School Relativity: Curving of Space & Mass Inflation Explained
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High School Lorentz transformation formulas for arbitrary distances
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Undergrad What is the mass of a black hole made of?
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Undergrad General Relativity: Is There No Universal Frame or No Way to Tell?
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High School Did I Just Create 2.5 Kilograms of Energy?
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Undergrad Metric Components: Inner Product of Vector U & V
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