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 Classical Aberration Formula: Understanding & Application
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High School Photon Mass: Does Light Have Direction?
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Undergrad Information traveling faster than light? (thought experiment)
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Graduate A question on proper time in special relativity
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Graduate Some algebra in Schutz's textbook
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Undergrad Understanding Papapetrou's Spinning Test Particles in GR
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Undergrad Violation of Special Relativity Principle?
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Graduate M-Theory: Bosonic Fields - Need Help With Part III
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Undergrad Is Spacetime Curvature Misunderstood in Eddington's Experiment?
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Undergrad Purpose of Tensors, Indices in Tensor Calculus Explained
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Undergrad Parallel Transport of a Tensor: Understand Equation
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Undergrad Time Dilation in Gravitational Fields vs Acceleration on Earth
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Undergrad Geodesics in Schwarzschild metric
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Undergrad Deriving Contravariant Form of Levi-Civita Tensor
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Undergrad Showing Determinant of Metric Tensor is a Tensor Density
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Undergrad Relativity of Simultaneity Questions
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Undergrad Velocity in Relativity: Theoretical Analysis of Multi-Dimensional Universes
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Undergrad Expressing Vectors of Dual Basis w/Metric Tensor
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Undergrad Does a Magnet Curve Spacetime More Than a Non-Magnetic Mass?
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Undergrad Pole in the Barn Paradox: Exploring Relativity of Simultaneity
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Undergrad Calculating Force & Acceleration in Electrostatic Field (B=0)
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Undergrad GPS clock synchronization in ECI frame
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Undergrad Mass of Water Increasing with Heating
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Undergrad FTL Travel: The Matryoshka Paradox
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High School Reactionless Drive Using Light Bouncing Off Moving Mirrors
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Undergrad What is the Meaning of Foliate in Physics and Spacetime?
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High School Inertial Frame of Ref & Forces: Understand Special Relativity
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Insights A Principle Explanation of the “Mysteries” of Modern Physics
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Undergrad Relative Speed of Light Between Objects
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Undergrad Light Emission by Stars: Mass, Red Shift & Hubble's Law
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Undergrad Questions regarding traveling speed in time and gravity as a force
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Undergrad Does Special Relativity Affect Mass?
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Undergrad Scope of General Relativity: Assumptions & Implications
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Undergrad Can You Derive \(T^{\mu\nu}\) From the Given Lagrangian?
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Undergrad Transpose and Inverse of Lorentz Transform Matrix
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Undergrad Schwarzschild Metric Singularity: Why?
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High School Does GTD Really Cause Gravity? | Brian Greene/Horn/e's 2011 The Hidden Reality
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Undergrad Force on Scale in Rocket Scenario: Calculation & Discussion
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Graduate Some questions about the derivation steps in the Gravitational deflection of light section in Schutz
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High School How do we know what would happen if time reversed?
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High School Derive Special Relativity: Alternative Paths
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Graduate Can the geodesic equation be derived from the EFE in a certain limit?
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High School What is the distance at which gravity and the cosmological force are equal?
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Undergrad Equivalence principle question
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Undergrad Position Vector in Curved Space Time: Explained
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High School Doppler Shift of Neutron: Energy & Momentum
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High School Cosmological Red Shift in a Perfectly Reflecting Box
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High School How Do Points M and O' Move Relative to Point O in Space and Time?
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High School Faster than speed of light due to time dilation?
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Undergrad Gravity at Schwarzschild Radius of a Black Hole
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Undergrad Another interpretation of Lorentz transformations
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Undergrad Is Covariant Derivative Notation Misleading in Vector Calculus?
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High School Is Relativity the Evolution of Classical Physics?
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Undergrad Time Dilation: Variables Beyond Speed & Gravity?
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Undergrad Left Invariant Metric: What I Don't Understand
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High School Okay, so is Mach's principle true, or not?
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Undergrad Discussing Interior Schwarzschild Proper Lengths & Gaussian Curvature
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Undergrad Gravity: Introduction to Einstein's General Relativity
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Undergrad A short derivation of the relativistic forms of energy and momentum
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Undergrad Wavelength of Light Ray Affected by Gravity
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High School Need to Check GR Beliefs? Integrity Filter Here!
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High School Why Does Mass Pull on Other Stuff?
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Undergrad How do forces change with speed?
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High School Light Speed Traveling: Cosmic Background Radiation Effects
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High School Gravitational Lensing: Refraction or Something Else?
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Undergrad Derive Escape Velocity GR: Source for Schwarzschild Metric
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High School Energy & Pendulums: Is Negative Energy Real?
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Undergrad Negative Distance Metric: Elapsed Time & Space-Time Interval
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Undergrad If gravity is not a force, what is holding us down?
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High School MEGA Drive: Jim Woodward's Propulsion System, Real or Fiction?
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Undergrad Uncovering a Decent Proof of E=mc^2
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Undergrad Calculating Covariant Derivative of Riemann Tensor in Riemann Normal Coordinates
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High School Explanation of light speed limit
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High School Time Dilation: Does Observer See Your Time Speed Up?
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Undergrad Coordinate System for Minkowskian Spacetime Relative to Event
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Undergrad General relativistic comparison to Newtonian physics
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Undergrad What is the confusion surrounding time as a coordinate in general relativity?
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Graduate Essential Difference Between Crossable & Non-Crossable Event Horizons
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Undergrad Stress-Energy of Star Collapsing into Black Hole
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Graduate Fluid Flow Symmetry: Showing $\pi_b G^b$ is Constant
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Graduate Thermality & Nonthermality of Radiation in Curved Spacetimes
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Undergrad "Testing the black-hole area law with GW150914"
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Undergrad Calculating Time Elapsed in Rocket Collision
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Graduate Geodesic Expansion: Finding the $\theta_{\pm}$ Factor
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High School Sine-Gordon model for better understanding of special relativity?
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Undergrad Electromagnetic Field & Space-Time: Relationship Explained
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Undergrad Gradient Energy: Definition & Classical Mechanics
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Graduate Gravitational Quadrupole Formula: Polarization Tensor
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High School What Drives the Acceleration of the Universe's Expansion?
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Undergrad Transforming Object Positions b/w Frames: A Procedure
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Undergrad Does the Topology of AdS4 Affect Global Hyperbolicity?
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Undergrad The bending of starlight is twice the Newtonian prediction
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Graduate Computing Null Geodesics in Schwarzschild Geometry
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Graduate Calculating Lie Derivatives for Tensors & Vectors
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Undergrad Light Clock Animation App: Find, Start & Feedback
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High School Time Dilation Effect: Corrections to Clocks on ISS
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High School SR equation seems to depend on orientation of the 'light clock'
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High School Is E=mc^2 a Bidirectional Equation in Physics?
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Undergrad Does charging my phone increase its gravitational force?
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Undergrad Correlation vs. Causation: Knowing the Difference
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