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 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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Undergrad Identifying Manifolds with Different Co-ordinates: Easy Solutions
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Undergrad Find GR Equation: Collapsing Orbit & Gravitational Wave
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Undergrad GR: Can Units Tell You if Quantity is Covariant or Contravariant?
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High School What Is the Proper Time of the CMB and Its Implications?
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High School Time like spacetime interval, proper time, and time dilation
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Graduate Kerr Metric Time Dilation Formula: Deriving Absolute Form
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Undergrad How Does the Twin Paradox Apply to Light and Sound Waves?
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Graduate Gravitational field of an infinite flat slab
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High School What Happens to Time and Space Near a Black Hole's Event Horizon?
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Graduate Finding Killing Vectors of FLRW Metric: Simple Equation?
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Undergrad C in a Vacuum: Evidence of Constant?
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Undergrad Boost Generators: Physical Meaning & Observable Quantities
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Undergrad Leading Clocks Lag: Twin Paradox Explained
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Graduate Non-Linear Theory: Summation Meaningful in Einstein Gravitation?
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Undergrad Speed of EM & Mech Waves: Maxwell's Law Explained
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Undergrad Twin Paradox: Spacetime Physics Ch.4 & 202 Year Difference
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High School I have a conceptual question about relative mass
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Undergrad Configuring Laws of Motion: Static/Dynamic
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Undergrad Could spacetime be non-orientable?
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Undergrad Summation notation and general relativity derivatives
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Undergrad Solving Proca Lagrangian w/ Extra Operator: Find Laws of Motion
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Undergrad Does Time Slow Down in a Deep Osmium Room?
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Undergrad Laws of Motion for New Lagrangian: Partial Differential Equations
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Undergrad Compute Length Contraction: Is ##l=1## a Possible Model?
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High School Helium Balloon: Explaining Special Relativity Effects
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Undergrad Lorentz Ether Theory: History & Explanation
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Undergrad Riemann Curvature: Understanding Parallel Transport on 1D Rings
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Undergrad Metric: Proper Space vs Coordinate Space
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High School Can Relativistic Effects Alter Thermodynamic Processes in Experiments?
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Graduate Kerr Metric: Removing Singularity via Coordinate Transformation
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Undergrad If energy is relative, is the rest mass also relative?
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Graduate The gravitational constant measured by the smallest object
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Undergrad Are Tidal Forces Curvature of Space?
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High School What Happens If You Become Completely Still in Space?
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High School How does special relativity apply to the rocket equation?
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Undergrad Special Theory of Relativity & Conservation of Mass
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Undergrad General relativity - covariant superconductivity, Meissner effect
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Undergrad Calculating the Area of an RN Event Horizon with Specific Heat Formula
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Undergrad Michelson-Morley Experiment: Objection Explained
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Undergrad Why is Scalar Massless Wave Equation Conformally Invariant?
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High School Find Numerical Relativity Source Code
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Undergrad Can a distant object behind a cosmic string appear as a double image?
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High School Can Energy Really Be Converted to Matter in Everyday Life?
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Undergrad Linear & Rotational Motion: Speed of Tip in Lab Frame
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High School Thought Experiment : Try and get Alice to "0%" the Speed of light
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High School Conservation Laws & General Relativity: Understanding Energy
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Undergrad Components of *J in Kerr geometry
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High School How Can We Derive the Relativistic Rocket Equation?
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Graduate How can I take the derivative?
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Graduate Obtaining the Orbit equation (Effective Potential) from the Newtonian metric
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Graduate Exploring Epsilon Simultaneity: Advantages and Applications
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Undergrad Is mass the source of spacetime?
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High School Relative speed of two oppositely directed light beams
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High School Travel Times & Distances: Twin Paradox & Alpha Centauri
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Graduate Solving Linearized EFE for Newtonian Potential Under Lorentz Gauge
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