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.
Undergrad Is Spacetime a Real Physical Entity or Merely a Conceptual Framework in Physics?
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Undergrad Quaternions and Special Relativity
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Undergrad Escape velocity near a black hole: Newtonian or Special Relativity?
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Undergrad Circumnavigating the Universe in Cosmos (1980)
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Undergrad Definition of time-independent scalar field in GR
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Undergrad Congruence of curves in spacetime
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Undergrad Distance between two light pulses
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Undergrad Solution To Photon Trajectory Equation
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Undergrad Inertial reference frame and Bondi k-calculus
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Undergrad Regarding centrifugal effects on the time dilation of a moving clock
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Undergrad A question about Curved Spaces: Gauss and Riemann (Einstein Gravity in a Nutshell by Zee)
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Undergrad Handshake paradox involving the Starship Enterprise
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Undergrad Spatial homogeneity condition for a free particle Lagrangian
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Undergrad Comparing Tick rates of clocks across Frames
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Undergrad What causes an accelerated clock to record less events
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Undergrad Symmetrical acceleration of Synchronised clocks
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Undergrad Doppler effect in transparent media and the index of refraction
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Undergrad Spaceship drive using symmetrical frame dragging?
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Undergrad Can Propeller Speeds and Wave Breaks Challenge the Speed of Light?
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Undergrad Derivative w.r.t. time of relative position in special relativity
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Undergrad How Can I Get Published Without an Endorsement?
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Undergrad Series Expansion of the Infinitesimal Spacetime Interval
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Undergrad Understanding the Equivalence Principle
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Undergrad How can the Universe know when you change directions?
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Undergrad Two or more gravitational lenses perfectly aligned with Earth?
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Undergrad Reflections on Relativity web pages broken at mathpages.com
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Undergrad What Is the Radius of Curvature of Space on Earth's Surface Due to Its Mass?
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Undergrad What Experiments Demonstrate Time Dilation?
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Undergrad Fermi-Walker transport of proper acceleration along timelike congruence
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Undergrad Mother of all equations for the Lorentz force
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Undergrad Properties of Born rigid congruence
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Undergrad Muon travel distance vs Atmosphere Thickness?
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Undergrad Can there be a maximum curvature of spacetime?
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Undergrad For a relativistic spaceship, what is the most recent news the ship gets from Earth?
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Undergrad Bell's Spaceship Paradox, Born Rigidity, and the 1-Way Speed of Light
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Undergrad Is there a gravitational effect on spatial measurements
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Undergrad How can the volume of a star be determined?
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Undergrad Deriving e=mc^2, how is it possible?
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Undergrad I want a good reference to a discussion of the meaning of "the speed of light is constant"
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Undergrad Potential Energy in a Stretched String in SR
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Undergrad Correct Description of Black Hole Interior
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Undergrad How Does Mass Influence Spacetime Curvature?
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Undergrad GPS system and general relativity
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Undergrad One-Way Speed of Light: Is it Possible?
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Undergrad Question about Two Clocks in this Relativity scenario
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Undergrad Why does general relativity break down at high energies?
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Undergrad Bell's spaceship paradox unknown? Interpretation?
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Undergrad Why Is the Invariant Interval True for All Values of s?
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Undergrad Twin Paradox - difference between outbound and inbound
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Undergrad I have a question about gravity -- If the value of the energy momentum tensor (Tμν) becomes zero, can it become gravitational-free?
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Undergrad What if particles are moving near light speed and one slows?
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Undergrad Does Phantom Dark Energy Violate Conservation of Energy?
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Undergrad Understanding the phrase "simultaneity convention"
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Undergrad EM Faraday tensor transformation for conductor carrying current
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Undergrad Experimental evidence of the existence of an event horizon
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Undergrad Can “speed of light” distinguish all Timelapse videos from real motion?
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Undergrad Spacetime coordinate smoothness requirement
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Undergrad Gallilean v/s Lorentz transformation
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Undergrad Did the Michelson-Morley Experiment Disprove the Ether Theory?
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Undergrad Gravitational wave propagation in GR
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Undergrad Information transfer between moving bodies - sped up or slowed down?
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Undergrad Does expanding space cause cosmological redshift?
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Undergrad What if one is in 1905 and debating foundational fundamentals?
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Undergrad Couple questions about time re-scaling function in Birkhoff’s theorem
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Undergrad Proving speed of light constant “c” is the same in all directions?
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Undergrad Intra-Universe Wormhole Metrics
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Undergrad General Relativity and the precession of the perihelion of Mercury
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Undergrad Does gravity bend gravitational waves?
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Undergrad When time is not orthogonal to phi, that means there is a preferred direction in space? How?
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Undergrad Basic Special Relativity question but the math isn’t working
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Undergrad Are gravitons necessary?
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Undergrad Can you indeed rescue a person from a Black Hole?
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Undergrad Why isn't TT gauge over constrained?
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Undergrad Minkowski to Euclidean line element from coordinate changes?
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Undergrad Final part of proof of timelike Killing w/ Frobenius --> static
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Undergrad Einstein field equations
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Undergrad Online Christoffel Symbols Calculator
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Undergrad A question about Relativity of Time using Time dilation experiment
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Undergrad On the existence of Gravitational energy in General relativity
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Undergrad Null energy condition constrains the metric
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Undergrad SR flat Lorentzian manifold and Anderson simultaneity convention
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Undergrad The generators of a ``Poincare-type'' group in momentum space
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Undergrad Understanding Spacetime simultaneity in twin paradox scenarios
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Undergrad Construct a Diagram that Illustrates The Galilean Law of Addition of Velocities
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Undergrad Standing light waves if the one-way speed of light were not constant?
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Undergrad Evaporating black hole: First principles consideration
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Undergrad Pullback & orthogonal projector
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Undergrad Unruh Radiation and Black Holes
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Undergrad What Would the Universe Look Like as a Manifold with Boundary?
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Undergrad How to get metric field using a path dependent parallel propagator
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Undergrad What are Killing vectors?
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Undergrad Is this a Killing vector field?
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Undergrad Which theory of time is the most evidence-based?
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Undergrad Time dilation from galactic gravitational mass
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Undergrad Is time dilation a real effect?
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Undergrad Falling through the event horizon of an evaporating black hole
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Undergrad A. P. French "Matter and Radiation: The Inertia of Energy"
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Undergrad Killing fields commute if they are asymptotically coordinate?
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Undergrad Meaning of the invariants built from the angular momentum tensor
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Undergrad Conservation of stress-energy tensor
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