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.
Graduate Are Spacelike and Timelike Orthogonal: Mathematical Proof Explained
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Undergrad How Does Time Dilation Affect Jill's Perception of Jack's Clocks?
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Undergrad If Mass is relative, is "gravitational" mass relative?
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Undergrad Can time be compressed without affecting distance?
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High School Can Two Objects Exist in Each Other’s Past Simultaneously?
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Undergrad Clock Synchronization: Jack & Jill's View
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Undergrad Time dilation of a rotating disk
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Undergrad What Does Shankar Mean in Prof Shankar's Introduction to Relativity?
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High School Zeno's arrow paradox and general relativity?
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High School Magnitude of gravitational time dilation
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Undergrad Understanding Schutz's Geodesic Deviation Eq. 6.84
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Undergrad Gradient one-form: normal or tangent
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Graduate Can time be considered a direct function of movement?
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Undergrad Moving Clock: Lorentz Factor Calculation
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Undergrad Relativistic doppler shift and radar
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Undergrad Why would we need faster than light travel?
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High School Object A is moving relative to O , what does it mean?
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Undergrad Einstein's Train: Does Speed Exceed c?
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High School How Planetary Bodies Affect Space Time
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Undergrad Special relativity: frames of reference
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High School Ideal demonstration of time dilation
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Undergrad Radial Proper Dist. Objects Free Fall: Calculating Δs
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Graduate The formation of the event horizon.
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Undergrad What is Einstein's equation used for?
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High School Charged Black Hole Hawking Radiation: Answers to Questions
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Undergrad Myths of Modern Popular Physics
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Undergrad Question about deriving E=mc^2
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Undergrad Relativistic relative velocity
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Undergrad Symmetry of Liénard-Wiechert Potentials
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Graduate Time Dilation Test: No Deviation From Relativity Predictions Found
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Undergrad Test the Speed of Light: Traveling Toward a Strobe Light
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Graduate Four velocity with the Schwarzchild metric
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Undergrad Do most physicists believe time flows?
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Undergrad Thought Experiment Contradiction: Find the Answer
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Graduate How these notions relate to the usual SR approach?
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Undergrad Spinor Representation of Lorentz Transformations: Solving the Puzzle
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Undergrad Applications of Wedge-Product and Differential Forms
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High School Relativity Scenario Help: A Seeing B's Line Shorter or Longer?
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Undergrad Could it be that the photon has a non-zero mass?
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Undergrad Relativity of simultaneity, time dilation misunderstanding
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Undergrad Path of Photon in Free Falling Lift: General Theory of Relativity Q&A
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High School Second Opinion Needed: Time of Light Pulse Arrival
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High School What is the Worldline of a Quantum Particle Before and After State Reduction?
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Undergrad Constructing Vector in Another Basis
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Graduate Gravity of a Light Pulse: Relation to E/c^2
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Undergrad Calculating Gravitational Mass of Compressed Gas Cylinder
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High School Math Help for Advanced Simulation of Twin Paradox
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Undergrad Energy contained in fuel in speed of light ship
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Graduate How to Integrate the geodesic equations numerically?
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Undergrad Particle accleration under gravitational waves?
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High School An Interpretation of the Geometry of Space-Time Inside a BH
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Undergrad Query on basic mechanics of Special Theory of Relativity
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Undergrad Velocity Addition & Relativity of Simultaneity
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Graduate Show Spherical Symmetry of Schwarzschild Metric
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High School How Can Time Derivatives Be Taken in GR and SR with Orthogonal Basis Vectors?
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High School DeltaT of clocks at endpoints of a rocket post acceleration
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High School Visualizing GR Geometry: Software for Einstein Field Equations
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Undergrad "General Relativity" by Wald -- question
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Undergrad Help with infinitesimal transformation to finite transform
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Undergrad Force applied by a moving object
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High School Why should spacetime/manifold be smooth?
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Undergrad Gravity: Contraction of Space?
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High School Spacetime same size during Big Bang up to now?
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High School Another question about relativity: the force
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High School GR vs quantum vacuum Lorentz invariance
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High School Question about GR and Quantum gravity
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High School Michelson-Morley Exp: Surprise of Result
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Graduate Finding geodesics using the squared Lagrangian
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High School Einstein relativity is invalid
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High School Alien Perception of Time: Can Time Go Backwards?
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Undergrad Relativistic charged particle in a constant uniform electric field
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Graduate Alien Perception of Time - Can Time Go Backwards?
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High School Time Dilation, Interstellar Travel, and "The Forever War"
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High School Is Lorentz contraction explained by space time diagram ?
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High School Special Relativity: What Time is it?
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Undergrad Consequences of Rotating Objects C on Coil A Frequency
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Undergrad Error in Lorentz Invariant Integration
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High School What Would Happen in a Universe with Negative Curvature of Spacetime?
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High School Relative Speed of 2 Beam Lights: Is it C or Zero?
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Graduate Hypermomentum & Belinfante-Rosenfeld: Same Object?
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High School What if gravity wasn't geometry—would conservation laws still hold?
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High School Does gravity change the permittivity/ permeability of vacuum?
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High School The Relationship Between Gravity and Time
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Graduate Inertial Frames: GR to SR | General Relativity
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High School What is the Correct Method for Deriving p = γmv?
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Undergrad Farthest distance a human can travel from Earth in a life
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Graduate Find the determinant of the metric on some graph
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Undergrad Twin Paradox: Comparing Lengths of Moving Rods
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High School Universal Compass Speedometer Redux: Relativistic Doppler?
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Undergrad Tidal forces on a spring-mass system
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Undergrad Maximize dτ w/ Schwarzschild Metric: Two Masses, m & M
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High School Warping Spacetime: Classical Physics & Relativity
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High School Light Bending on Single Point: What Happens?
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Undergrad What are the 2D Translational Killing Vectors in Polar Coordinates?
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High School Mass-Energy Equivalence: Does E=mc2 Apply in Systems at Rest?
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Undergrad Shining a light beam back -- relativity
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Undergrad Is it really possible that relativistic mass tends to reach infinity?
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Undergrad Crossing an Event Horizon: My Experience
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High School What is the mathematical expression for manifold duplication in Many Worlds?
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Undergrad The Shapiro delay and falling into a black hole
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