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.
I Effect of Radiation Pressure on a Moving Object
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A Does the EP imply that a free-falling observer follows a geodesic?
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I Temporal length vs. Temporal displacement
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A Covariant form of Maxwell's (inhomogeneous) equations (in GR)
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A Error in Landau-Lifshitz Vol 2, Fig. 20, page 310
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A "TImescape" models
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B Mass of a gyroscope when rotating or not rotating
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B A photon always travels in a black hole
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I Going Up-Down Elevator G-forces vs Bouncing off a Spring G-force
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B Michelson Morley experiment and the Doppler effect
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B Relativity and Biological Aging: How Time Dilation Slows Cell Activity
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A Minimal property of Spacelike geodesics in GR/curved spacetime?
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B An issue about the twin paradox
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B Can mass/energy simply be distorted spacetime?
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I Principle of relativity in the proof of invariance of interval
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I Epstein diagrams and a traveling ship
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B Lorentz Transformation of Electric & Magnetic Fields Visualized
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A Ricci tensor for Fermi normal coordinates
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B Time Travel: Is it Physically Possible? | Scientific American
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I Question about geometrical engineering (placeholder name)
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A "Looks" of gravitational wave emissions for an eclipsing ternary compact object?
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A Is parallel transport exactly norm-preserving or only approximately?
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B No object actually approaches the speed of light
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I What does g00 element of the Schwarzschild metric tensor tell us?
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B Can anything work (including human brains) inside a black hole?
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I Integral subbundle of 6 KVFs gives a spacetime foliation by 3d hypersurfaces
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I A textbook passage describing coordinate lines in physical space
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B When I jump up and down what is the Einsteinian way to describe it?
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I Twin Paradox Resolution
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I Notion of parallel worldlines in curved geometry
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B Question about “Inertia arises from interaction with the Universe’s mass”
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A Landau-Lifshitz pseudotensor - expressing the EM tensor ##T^{ik}##
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B Space travel and time dilation
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I Where is the mass in a black hole?
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I Can light be reflected in a black hole?
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I Reconciling smooth spacetime with variable, rotating, earth gravity
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B Is Gravity an illusion of a force but really a curvature of spacetime?
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B Meaningfulness of the speed of light
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I Measuring the Spacetime Interval with a Ruler
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I Does the metric in general relativity depend only on position because of the equivalence principle?
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B One-Way Speed of Light
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B If light beam travels through a vacuum, then through diamond, then through more vacuum...
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I About the meaning of "expanding universe"
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I CTC on FLRW cosmological models
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A Vanishing of an integral of a divergence over a closed surface
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I Spacetime topology of the Universe
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I Clock rate in hyperbolic space-time manifold
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I E=mc^2 and acceleration
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I [SR] light shot at an angle in a moving train
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A Velocity Verlet for relativistic simulation
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I Relativistic Doppler effect and refraction
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I "Exploring Time Perception Across Different Regions of Space"
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I Black hole and coordinate time from the perspective of Alice outside
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B Do all events in my past lightcone have fewer past events in theirs?
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A Dirac on localization of energy in the gravitational field
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I Field equation interpretation
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I Black hole formation and infinite redshift
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I Two-way light speed invariance
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B A question about the self consistency principle
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B Prove the velocity of a moving object is absolute in one IRF?
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I Are equations for spacetime intervals correct?
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I Is there a maximum relativistic acceleration?
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B Drawing a Minkowski diagram to show multiple Points of View
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I Why is Rømer's light speed measurement not one-way?
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B Does Spacetime Have Physical Existence?
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A Value of quintessence while studying black hole thermodynamics
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I Relativity of Simultaneity question (use Einstein synchronization)
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I How to correctly mark event B on the picture?
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I Non-Inertial Relativistic Dynamics
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A The wave vector ##k_\mu## in curved spacetime
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I Chain of lights falling into a black hole
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A Spacetime model of evaporating black hole
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I An alternative derivation of the equation of motion in General Relativity
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I Alive in one frame and dead relative to other?
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I You can't actually enter a blackhole?
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A Spacetime interval in Galilean relativity
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A Dirac's derivation of the action/Lagrangian for a free particle
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I Relating orthogonal accelerations in special relativity
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B Simplest symmetrical time dilation question
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B Einstein thought experiment confusion: “light clock in a moving frame”
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I Angles between 4-vectors in special relativity?
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I Confusion about Cauchy surfaces
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B Is SpaceTime just DistanceTime?
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I Lecture on Newtonian spacetime
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B The ONE Ring has been Found
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B Theories about light and time near a black hole
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B Lowering a rope through the event horizon
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B Car spinning on a frictionless sheet of ice = absolute motion?
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I Path independence redshift photon
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I Charged particles and electromagnetic waves in transparent media
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I Lasting effects of Mass and Distance Dilation
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I The Faraday disk in the context of the theory of relativity
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I 2 objects of enormous volume each in relative motion very close to c
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I When Does a Train Passenger Experience Complete Darkness in a Tunnel?
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I Matrix form of metric component transformation?
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I Energy and reference frames
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I GR as Gauge Theory
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B Can we say that everything on the planet is made up of energy or matter?
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A A better way of talking about time?
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I Are Space and Time Just an Illusion in General Relativity?
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