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 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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High School Einstein's Greatest Mistake? Examining the Lorentz Transformation
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High School Rod falling radially towards the center of a mass
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Undergrad Is the universe a larger version of a black hole?
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High School Can gravitational wave escape a black hole
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Undergrad MOND: Explaining the “Missing Mass” Problem in Galaxies
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Undergrad Metric Conservation Law in 2D Spacetime
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Undergrad Do Distant Planets Move Faster Than Light Seen From Earth?
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Graduate Q: Scalar Boundary Condition & U(1) Isometry - Lewkowycz & Maldacena
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High School Can a Spaceship Use a Planet's Gravity Like a Treadmill?
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Graduate What is the coordinate free stress-energy-momentum tensor
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Undergrad Velocity of Timelike Curve in Special Relativity
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Undergrad Clarifying Equivalence Principle
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Graduate Field of Moving Masses: EM Purcell
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Undergrad Taylor and Wheeler's Spacetime Physics (1st Edition)
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High School The Nature of Light: A Scientific Exploration.
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Graduate Was the LIGO team over-hasty to claim black holes confirmed?
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Undergrad Morin's Rocket Example: Chapter 12, Page 606
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High School Why do gravitational waves propagate at the speed of light?
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Graduate Mapping Tangent Space to Manifold - Questions & Answers
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High School Understanding the Sign of Relative Velocity in Approaching Observers
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High School Kinetic Energy Dependent on Frame of Reference?
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High School Black Hole SHM: Gravitational Force
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Undergrad Show 4-Potential is 4-Vector in Lorenz Gauge
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Graduate Least Action Principle Applied to Vector Field ##A_{\mu}##
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Undergrad Speed of light or Speed limit of Spacetime?
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High School Time travel with tachyons cause infinite dilemma?
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Undergrad Communicating at Near-Light Speed - Time Dilation
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Undergrad Motivation for the usage of 4-vectors in special relativity
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Undergrad Is motion through space or spacetime?
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High School Could information travel faster than C
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Undergrad Are the Lorentz transformation formulas on wikipedia correct?
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Undergrad Does non-gravitational acceleration produce waves?
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High School How does relativity impact our everyday lives beyond GPS and nuclear energy?
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High School Can a black hole event horizon grow at the speed of light?
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Undergrad Space & Time: 2 Qs for Forum Members
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Undergrad Gravitational Constant in GR: How & Why?
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Graduate Theories that respect one form of the equivalence principle but violate another
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Undergrad Energy Locally Never Negative: Explained
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High School Does space contraction regard the moving body or the path?
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Graduate Relativistic orbital precession in practice
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Graduate Momentum 4 Vector Notation: Differences Explained
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Undergrad Production of Gravitational Waves Problem: Energy Flux
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Graduate Covariant derivative definition in Wald
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Undergrad Proper mapping of the second postulate into math
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Undergrad Why curved spacetime produces gravity (am I right?)
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Undergrad Why Can't Lorentz Boosts be Used for Length Contraction?
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High School Magnetic field at relativistic speed
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Undergrad Spacetime Changes vs Matter Location Inside
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Undergrad What is Planck curvature and its significance in the expansion of the universe?
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High School Is the Universe discrete or continuous?
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Graduate Understanding Dirac Adjoint Derivation & Spinor Transformations
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High School Newtonian vs Relativistic Mechanics
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Graduate Investigations into a heuristic Lagrangian of graviton field
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Undergrad Event Horizon of Telescope Through Earth: Does It Exist?
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