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