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 Question about cosmological constant
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High School Experimental evidence that pure energy can curve spacetime?
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Undergrad Cosmological Constant Problem: Pre-Req Knowledge for Paper
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Graduate Stress energy tensor general relativity
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Undergrad Minkowski diagrams without scales on axes
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Undergrad Leading and lagging clock times in Lorentz Transforms
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Undergrad Special relativity and magnetism
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Undergrad Wald's Mistake on Einstein Tensor pg 97?
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Undergrad If c changes w/ time, what happens with laws of SR?
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Undergrad Galilean Relativity: Can Experiments Tell Motion Relative to Other Frames?
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High School Einstein Elevator: Time Dilation Questions Answered
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Undergrad Book Suggestions: Learn Einstein's General Theory of Relativity
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High School LIGO Detection Question: Why Lighter Masses Mean More Time
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Undergrad Understanding General Relativity
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Graduate Rumors of Gravitational Wave Inspiral at Advanced LIGO | Sept 2015 Launch
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High School Observer Sees When I Throw Ball at Speed of Light
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Undergrad Friedman-Robertson-Walker metric
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High School What Happens to Spacetime Fabric at a Black Hole's Singularity When It Moves?
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Undergrad Parametrizing a path through spacetime
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Undergrad Holographic Principle discussion in Sean Carroll's book
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Graduate What is the Topological Structure of Hypersurfaces in General Relativity?
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Undergrad Meaning of the equivalence principle in General relativity
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High School Could a black hole involve a phase transition?
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Undergrad Gravitational Waves Vs. Aether Wind
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High School From dE=dm*c^2 to E=m*c^2: Integration constant?
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Graduate Prove Constant Curvature: Homogeneity Implied by Cosmological Principle
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Graduate John Norton on the Hole Argument
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Graduate An observation on potential energy in GR
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Undergrad Reconciling Simultaneity & Relativity: Navigating the Spacetime Maze
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Undergrad Black Hole & Spacetime Curvature: Can Mass Decrease It?
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Undergrad Time Dilation Explained: Muon Decay & Reaching Earth
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High School Who Compresses More: Obj1 or Obj2 at C Speeds?
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High School Twin Paradox Visualization: Understanding with Java & Diagrams
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Undergrad SR Pseudo-Paradox: Photons Affected by Emitter?
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High School Some basic questions about length contraction in SR
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Undergrad Time Dilation & Differential Aging: Defined
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High School Crashing into an event horizon
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Undergrad Could it be meaningful to speak of the "density of space"?
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Undergrad Is there any 2D surface whose metric tensor is eta?
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High School Deriving Special Relativity Formulae Steps
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High School Question about Michelson-Morley experiment
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Undergrad Quantum Mechanics & Relativity: Vacuum Connection?
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High School Understand Proper Distances in SR/GR: A Layman's Guide
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Undergrad Relativistic Momentum Invariance in Perpendicular Boosts
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Undergrad Galilean Equivalence Principle: Extended Objects
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Undergrad Fixed Stars Moving Faster Than Light? Problem?
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Undergrad Opposite of Black Hole - Matter Repulsion?
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Graduate Interpretation of [itex]\partial_\nu T^{\mu \nu}[/itex]
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Undergrad Special relativity of two clocks
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High School Does time stop at the center of a black hole?
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High School Connected events at opposite ends of a photon's travel
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Graduate How Does the Penrose Process Allow for Energy Extraction from a Black Hole?
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Graduate Which Representation of Christoffel Symbols is Correct?
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Graduate Deriving Einstein's Equation: Calculating ##R_{00}##
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High School Derivation of E=Mc2? For the common man
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High School What Does it Mean When a Black Hole is Spinning?
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Undergrad Small back hole merging more massive body
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Undergrad Looking out from a event horizon
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Undergrad Gravitational Mass of Photons: Passive & Active
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High School Time Dilation Model & Wave Interference: Newbie Questions Answered
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High School How well is Time understood i. Space time?
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High School Space-Time & Strings: Current Thinking?
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Insights A Problem from "Incandescence" - Comments
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Graduate Einstein & Light Deviation: Compute w/o Schwarzschild Metric
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Undergrad Do Fields Affect 4-Momentum Conservation?
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Undergrad Time dilation in special vs. general relativity
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Undergrad Maxwell's Homogeneous Eqns: Notation Explained | Mick
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Undergrad How Do You Correctly Apply Indices in Tensor Calculus for Curvature?
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Graduate Stress-Energy Tensor: Basics & Questions
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High School Calculating Mass for Gravitational Time Dilation
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High School Gravity Effects on EM Wave Phase Change
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Graduate Are temperature and pressure related by relativity?
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Graduate Conservation of Electromagnetic Energy-Momentum Tensor
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Undergrad Light Beam Bending by Mass: Equation & Explanation
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Undergrad Tensor Formalism in GR: Why We Need Tensors
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Undergrad Permeability/permittivity constants and one way speed of c
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Undergrad Raising index on covariant derivative operator?
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High School Do Higher-Dimensional Objects Experience Length Contraction in 3D Space?
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Undergrad Qs re Hawking Radiation – Part I
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High School Why r=0 is inevitable when crossing horizon?
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Undergrad Hawking Radiation: Qs re Energy Density at r > Rc
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Undergrad 2D Time dilation simulation with several clocks?
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Undergrad Cosmological Constant: Expanding Universe & Data Contradiction
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Undergrad Space and time as fields of mass-energy
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Graduate Subtraction of Christoffel symbol
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Undergrad Field equations fully written out
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Undergrad GR vs SR: Is a Connection Necessary?
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Undergrad Consequences of length contraction
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Undergrad Gravitational potential energy and rest mass
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Undergrad Time dilation in relativistic Doppler effect
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High School Energy required to change speed?
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Graduate Are Killing Horizon and Stationary Limit Surface the same?
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High School How to simply solve for E=MC^2?
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Graduate Why Do Torsion Tensor Derivations Differ Between Sources?
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High School Gravity & Acceleration: Is Space Shortening Explained?
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Undergrad Calculating Radius and Mass of Disc for Velocity 0.75C
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Graduate Anti-symmetric Christoffel symbol
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Graduate Interpretation of the EM tensor as a rotation matrix
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High School Virtual Particle Speed: Is It Measurable?
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Graduate Curvature tensor in all flat space coordinates
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