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 Questions about the Speed of Light, Time, etc.
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Undergrad Proof of Lorentz Gauge Existence: Help Understanding Schutz 8.3
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Undergrad Modeling the Earth and Sun (2 body orbits) using general relativity?
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Graduate Small and large extra dimension(s) of the physical space
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High School Calc Excess Rad on Earth in Curved 3D Space | Feynman Lectures 6-2
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Undergrad Does Special Relativity Change Our Perception of Others?
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Undergrad Conservation of Energy in GR: A-B System Analysis
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High School Time Travel: Can Humans Go Faster Than Ordinary Speed?
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Undergrad Light in an accelerated elevator
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Insights Oppenheimer-Snyder Model of Gravitational Collapse: Implications
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High School Derivation of time dilation without light clocks
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Undergrad Muon Decay Example from Morin's Book: Issues Explained
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Undergrad Gravity of the Sun: Einstein's Calculation and Beyond
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Undergrad Why Are the Two Diagrams in the Twin Paradox Not Symmetric?
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High School Relativity & Gravity: Resolving the Discrepancy
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Graduate Two degrees of freedom in GR after boundary conditions specified?
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Undergrad Train Simulation: Observer A and B Contradiction?
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High School Light Speed In Forward and Backward Directions
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Undergrad Visualising Torsion Tensor: Is There a Picture?
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Undergrad Special Relativity philosophy and anxiety
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Undergrad Physics Error in Larry Niven's "Neutron Star
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High School Can Matter Enter a Black Hole Intact? Debate & Advice
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Undergrad Contracting the stress energy tensor
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Graduate Oppenheimer-Snyder Model of Gravitational Collapse: Mathematical Details
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Undergrad Gravitation Machine Invented? Research Idea
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Graduate Do Astrophysical Black Holes Contain CTCs?
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High School Speed of Light Unaffected by Moving Emitter
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Undergrad How do angular displacement and rapidity relate in special relativity?
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Undergrad Time Dilation & Aging: Why Do Astronauts Age More Slowly in Space?
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Undergrad How can time only have one direction?
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Insights Oppenheimer-Snyder Model: Overview of Gravitational Collapse
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Graduate Static Gravitational Field: Why Must ##g_{m0} = 0##?
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High School Can there be time without mass?
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High School What if a needle hits Jupiter at nearly speed of light?
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Undergrad From Einstein Summation to Matrix Notation: Why?
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Undergrad Calculate Length Contraction for Accelerated Motion to Proxima Centauri
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High School My paraphrased explanation of the Twin Paradox
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Undergrad SR vs GR: Logical Necessity of Signal Propagation
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Graduate Two Questions about Novikov Coordinates
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Undergrad Arguments leading to the speed of light as a dimensionless constant
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High School Eddington Exp vs Newton: Comparing Starlight Deflection
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Undergrad Best Derivation of E=mc^2 - Fdx = V^2 dm
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High School The One-Way Speed of Light: Speculation of a Tired Mind
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Undergrad Need to resort to spherical wavefront to derive the LTs?
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Undergrad Charge conservation and special relativity
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High School Could Traveling at Near-Light Speed Create Black Holes?
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Graduate Decomposing Rank-2 Tensors in Dirac's "General Theory of Relativity
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Graduate Differential Forms Integration Exercise
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Undergrad Doppler Shift & Christoffel Symbols Issues
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High School Deep Space Speed Limit: What Prevents Exceeding Light Speed?
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High School Relativistic Velocity Addition: Is c Ever Exceeded?
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Undergrad Einstein's General Relativity w/o Cosmological Constant
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Graduate Principal Invariants of the Weyl Tensor
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Undergrad Gravitational Waves from Vanishing Sun: What Happens?
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Graduate Exploring "The Mathematical Theory of Black Holes" by S. Chandrasekhar
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High School Calculate Red Shift w/ Shwarzschild Metric: A Hypothetical Black Hole Any Size?
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Undergrad Understanding Admit & Adapt: Timelike Killing Vector Field
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High School Time dilation - what is the time on the Earth?
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Graduate Visualizing Arbitrary Coordinate System - Example Needed
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Undergrad Twin Paradox: Calculating Stan's Time Elapsed According to Moe
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High School What is x' for Moving Rocket from P?
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Undergrad Magnetic Field vs Spacetime: Effects on Inertia Disk
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Undergrad Jefimenko's Theory of Gravitation: Continued Discussion
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Undergrad Time-Like Events: Spatial Order Not Relevant?
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Undergrad Is this just a typo in Schutz' book on General Relativity?
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High School Is a Universe Without Mass and Energy Possible?
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High School Solve General Geodesics in FLRW Metric w/ Conformal Coordinates
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Undergrad Metrics of GR Solutions: Comp List, Hist & Viability
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High School Calculate Unit Normal Vector for Metric Tensor
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High School A question about relativity of simultaneity
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High School How much time passes on Earth?
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Undergrad Linearized Gravity: Bimetric Theory of General Relativity?
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High School Calc. Christoffel Symbols of Hiscock Coordinates
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Undergrad Can Spherical Symmetry Be Achieved Without Varying Line Element?
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Undergrad How is photon momentum compatible with special relativity?
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High School Understanding twin paradox without math
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High School Speed of Point on Expanding Sphere
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Graduate Propagation Vector of Light in Kerr Spacetime: Reference Needed
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High School Distance b/w 2 Points on Spacetime Diagrams: Meaning?
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Undergrad Do AEST (Absolute Euclidean Spacetime) models work?
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Undergrad Hawking Radiation Extrapolation: A Conjecture
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Undergrad Hawking Radiation: Can Particles Appear with Relativistic Velocities?
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Graduate Time Travel, General Relativity & Information Paradoxes
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Undergrad Time Dilation & Length Contraction: Graphically Explained
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High School Doppler Shifting of Light: Simplification or Reality?
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Undergrad Time Dilation in Gravitational Field: Potential vs Field Strength
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Undergrad Observing a Collapsing Shell: Time Dilation Explained
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High School Principle of Relativity: Classical Physics Example
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High School Metric Line Element Use: Do's & Don'ts for Accelerated Dummies?
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High School Gravity Between Two Stars 45 Billion Light Years Away?
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Undergrad Time Dilation for Photons: Explained
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Undergrad Cosmic Test Reveals Odd Findings for Einstein's Relativity
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Undergrad Twin Paradox with accelerated Motion
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High School How Did Einstein's E=mc² Transform Our Understanding of Inertia and Gravity?
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Undergrad Twin paradox for (accelerated) dummies?
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Undergrad Calculating Spacetime Around Multiple Objects
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High School Muon Tomography Evidence for Special Relativity?
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Graduate Why is Tau-AB^2 not t^2 + x^2?
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Undergrad Anti-symmetric part of an equation
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Undergrad What Is the Proper Time in Curved Space?
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