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 Is Absolute Space and Time Really Absolute?
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Graduate Time Dilation & Foreshortening: Understanding the Twin Paradox
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Graduate What Are the Limits of Classical Physics in Understanding Inertial Frames?
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Graduate Time Dilation Effects on a Probe
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Graduate Equivalence Principle Test Kits
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Undergrad What is the equation for the Schwarzschild Radius and why is π not included?
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Graduate Special Relativity: Solving for τ
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Graduate Positive Mass Theorem: Explained Simply for Gravity Shielding
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Graduate Eotvos effect - Apparent only?
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Graduate Why is Normal Area to Light Rays Invariant?
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Undergrad How many observers are needed to calculate the relativistic speed equation?
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Graduate Are all solutions to Einstein's Field Equations Lorentzian manifolds?
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Graduate How Do You Expand the Antisymmetrized Tensor \( T_{1234} \)?
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Graduate Is the Perspective of a Photon in Relativity Truly Timeless?
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Graduate Relativity Calculation: Two Events?
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Graduate Deflection of Light Around Massive Bodies
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Graduate Light Production in Gravity: Freq/Energy Impact?
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Graduate Relative Motion & Rotation of Axes of Reference
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Graduate Why can different observers agree on their relative velocity
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Graduate Gravitational Energy in GR: Energy Conservation Explained
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Graduate Curved-space Maxwell equations by differential forms?
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Graduate Deriving Max Symmetric Space from Spherically Symmetric - Sean M. Carroll
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Graduate Quick question on Geodesic Equation
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Graduate Moving object launched by observer into a Wormhole
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Graduate Intersteller: Lecture by Kip Thorne
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Graduate Gravity's reaction force in the relativist model?
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Graduate Does the Einstein Field Equation Apply to Small Particles like Electrons?
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Undergrad Get confused about time dilation
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Graduate Heuristic Evaluation of Stress-Energy Tensor
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Graduate Cosmological Constant, Einstein equation Quick Question
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Graduate Schwarzchild metric spherically symmetric space or s-t?
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Graduate Solving Einstein's Equation with Cosmological Constant: De Sitter Space
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Graduate Non-Constant Cosmo-Constant: Controversy in GR?
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Graduate Resolving Ehrenfest Paradox: STR vs General Theory
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Graduate SR vs GR Simultaneity: Comparing Moving & Static Observers
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Graduate Aging when travelling near the speed of light
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Graduate Coordinate basis for cotangent space
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Graduate Better Equivalence Principle Explained
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Graduate Is the depiction of curvature in wormhole diagrams accurate or misleading?
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Graduate Birkhoff's Theorem: Spherically Symmetric Vacuum Solution Static or Stationary?
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Graduate FRW Metric in d Dimensions: Can I Expand?
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Graduate Understanding Null Geodesics in Relativity: Insights from Dirac's Book
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Graduate Is Uncertainty in Physics Related to Relativity's Concept of Velocity?
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Graduate Are Everyday Objects Spacelike?
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Graduate Energy-Mass Equivalence & Higgs Field Interaction
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Graduate Killing tensor/vector very basic context question about consevation
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Graduate Help Solve FORTRAN Post Newtonian Gravity Simulation
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Graduate Looking for 'absolute still' with time dilation
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Graduate Index Notation: Understanding LHS = RHS
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Undergrad Einstein Mass-Energy Equation: Will Mass Change?
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Graduate What do you mean, approaching the speed of light?
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Graduate Einstein Equation Quick sign question
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Graduate How To Understand This Lorentz Transform?
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Graduate Vielbeins: Is $$e^1.e^1$$ a Basis Like $$i.i=1$$?
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Graduate Geodesics: Stationary Property & Dirac
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Graduate The Paradox of Aging in Relativity: Resolving the Twin Paradox with a Twist
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Graduate Newtonian Spacetime: MTW Chap 12 Q&A by Tom
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Graduate Rigidly Constantly Accelerating Frame
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Graduate Kruskal-Szekeres Radius: Explained for Beginners in GR
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Graduate Does FTL Communication Alter Time Dilation for Twin Observers?
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Graduate Time Dilation Across the Universe: Implications & Expansion
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Undergrad Accelaration & forces in different inertial referance frames
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Graduate Why Does Time Not Slow in a G-Field?
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Graduate The Schwarzschild Metric: Obtaining Equation M=Gm/c^2 & Newton Law at Infinity
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Graduate Does Time Contraction Change Substance?
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Graduate Time Dilation Explained by Stephen Hawking: 1 Day = 1 Year?
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Graduate Einstein Field Equation: Understanding Curvature and Geodesic Equations
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Graduate Photons Travelling at Less than c in "free space"
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Graduate Equivalence Principle: Feel Difference Between Situation A and B?
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Graduate Interpretation of Relativity of Simultaneity
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Graduate Relative velocities In Space-Time Diagram
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Graduate How to contract the christoffel symbol
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Graduate Killing Vectors conserved quantity along geodesic proof
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Graduate Can a maximal charged black hole have "flavor" or weak hair?
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Graduate A rock falling towards the center of earth according to GR
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Undergrad Understanding Cofactor & Adjugate Matrices
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Graduate Relativity Terminology: Lorentz Observer, Frame, Spacelike Vector
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Graduate Can Energy Be Converted into Mass?
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Graduate Complex Function & Spin Connection: What Changes?
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Undergrad Einsteins thoughts behind c2 in E=mc2
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Graduate Massless Particles: Force Bearing & Propagation Speeds
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Undergrad Perception of time, relative and distant.
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Graduate Fast Intersection of Crafts: Tau Ceti-Sol Trip
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Graduate Non-Moving Wormhole & Moving Observer: Paradoxes?
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Undergrad Einstein theory on bending of space
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Graduate Kerr metric and rotating stars
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Graduate Horizontal Photon Vertical Lift Acceleration
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Graduate What Are the Algebraic Mysteries in Energy-Momentum-Mass Relations?
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Graduate Do free-falling objects also curve spacetime?
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Graduate Lightning Bolts / Relativity of Simultaneity
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Graduate Can clocks ticking at different rates be synchronized?
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Graduate The reality of Relative Velocities in Special Relativity
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Graduate Relative Magnetic Fields: What is Reality?
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Undergrad Learning to Simplify the Curvature Tensor
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Graduate Flaw in Traveling to Destination Several Thousand Light Years Away
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Graduate Time in QM vs SR: Energy, Frequency & Motion
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Graduate Another flashlight from spaceship question
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Graduate Curvature of Space-Time: Why is Covariant Derivative Nonzero?
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Graduate Question about rotating reference frames
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Graduate Christoffel Connection & Curvature in GR: Understanding Singularities
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