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 Can 5D Kaluza-Klein Theory Be Adapted for 2D Space-Time Models?
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Undergrad A light wave and a sound wave travelling together
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Undergrad Is Anything Truly at Rest in Every Frame of Reference?
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High School If in a lift we can tell if acceleration is due to g or to a push
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High School Is there an opposite phenomenon for time dilation ?
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High School Time on 1st & 2nd Floors: Gravity & Light Measurement
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High School How can we derive the value of energy in rest mass and the relationship to c^2?
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Graduate Weyl Vacua Solutions to GR: Derivation from Riemann Tensor
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Undergrad Solving Mass-Speed Relation Proof Challenges
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High School What is the difference between curved spacetime and a field?
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Undergrad Explain Relativistic Mass: Special Relativity & F=ma
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Undergrad Is gravity really not a force according to the weak equivalence principle?
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Undergrad Godel Solution Metric: Shapes & Descriptions
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High School Speed of Light Invariant in Vacuum: Experiment Proof
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Undergrad Past Existence: Can Conjectures Be Tested?
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High School Study Special Relativity: 6th Formers, Books & Websites
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High School Understanding the Mystery of Sunlight Bending During a Solar Eclipse
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Undergrad Is There a Mistake in My Understanding of Planck Units and Dimensional Analysis?
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High School Can you explain GR without math?
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Undergrad Trick for Remembering Schwarzschild Christoffel's/EFE's?
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High School Gravity: Attractive or Repellent? Unanswered Questions
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Undergrad Speed of light and speed of sound both constant
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High School Einstein's relativity of simultaneity & quantum paradox.
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Undergrad Morris-Thorne Wormhole Metric Terms
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Undergrad Correctly Using Lorentz Transformations: A Special Relativity Problem
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Undergrad Inside Black Holes: Unraveling the Kerr Metric Structure
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Undergrad Uniform acceleration and hyperbola
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Undergrad Could I travel to andromeda in my lifetime?
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Undergrad Stupid question on index lowering and raising using metric
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Graduate Einstein Hilbert action integral
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Undergrad What is an angle deficit in the curved space in GR?
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High School How are matter and spacetime connected above the Planck scale?
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Undergrad Are There Black Holes in Galaxy Clusters?
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Undergrad LIGO light changes frequency not wavelength
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Undergrad Radio Comm Between 2 Points Diff Gravity: True?
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High School Nobel Prize in Physics for Relativity?
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High School Energy Stored in Charged Capacitor: Kaluza-Klein Theory
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Graduate Domain Wall Geometries: Continuous Coordinates, Discontinuous Metric
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Undergrad Why can't you use Simultaneity when doing Length Contraction
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Graduate Lorentz Fitzgerald contraction
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Undergrad Need for GR: Historical Indications
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Undergrad Exterior Schwarzschild Solution & Gravitational Time Dilation
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High School Observeving Black Hole and Time Dilation Question
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Undergrad Newtonian 4-Momentum Norm Analogue
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Undergrad Cox & Forshaw: Explaining E=mc^2's "Negative" Option
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Graduate Physical reasons for having a metric-compatible affine connection?
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High School Gravity's Impact on Box w, l, & h: Myths & Facts
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Undergrad Total Energy of Particle in Potential: SR Explanation
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Undergrad Did the Big Bang separate space and time
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Undergrad Vector Transformation Law and Vector Spaces: Is it Abuse?
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Undergrad Lines of simultaneity in Twin Paradox spacetime diagram
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High School Photon in a Box: Is Light Affected by Volume?
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Undergrad What Does the Ricci Tensor Reveal About Einstein's Field Equations?
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High School Planck's Length, Length Contraction?
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High School How Far Is It To The Center Of The Milky Way/Tootsie Pop?
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Undergrad Metric for Infinite Rod in Gen. Relativity
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Undergrad Spatial geometry of constant Schwarzschild time hypersurface
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Undergrad Is Flamm's paraboloid a paraboloid?
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High School Is Gravity Trapped Inside Black Holes?
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Graduate Solving Exact Gravitational Plane Wave Confusion
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Undergrad Action in Relativity: Non-Relativistic vs Relativistic Particles
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Undergrad Deriving EM Energy Conservation from Lagrangian
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Undergrad Relationship between quadratic and square-root lagrangians
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Undergrad Time dilation time travel for novel - I need a calculation
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Undergrad Does the 1 Second after the Big Bang = 1 second now?
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Graduate Metric with Harmonic Coefficient and General Relativity
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Graduate Speed of Light in All Reference Frames: A Question
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Undergrad Gravitational Lagrangian density
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High School Is Gravity Really Just Curved Spacetime?
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High School Understanding Minkowski Diagrams in Special Relativity
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Undergrad Why does time dilation affect all clocks equally?
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Undergrad Velocity Addition: Physical Meaning of Non-Singularity at c?
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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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