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 Black hole and singularity
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Graduate What kind of topology change does this Lorentzian metric describe?
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Undergrad General relativity question: Gravity clock
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Undergrad Formulating the Poincare group and its double cover
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High School Why Does the Speed of Light Max Out at 186,282 Miles Per Second?
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Undergrad Geodesics in Schwarzschild: Reparametrizing the Equations
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High School Very simple exercises in General Relativity
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Undergrad On the possibility of exploding a black hole
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Undergrad Basic questions about E=mc^2 energy conversion
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Undergrad Do black holes have magnetic fields?
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Undergrad SR-time dilation vs GR-time dilation on rotating Earth
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Undergrad Affine parameter and non-geodesic null curves
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Undergrad Where is the mistake in this derivation of Length Contraction?
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Graduate Energy-to-angular momentum ratio in EM v. gravity quadrupole radiation
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Graduate Quadrupole radiation formula for gravity
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Undergrad Special relativity & Synchronization of clocks
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Undergrad Frame fields and congruences of worldlines
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Undergrad Lorentz invariance of the 4-momentum
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High School Would an object in orbit change facing or orientation?
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Graduate A very peculiar emergent definition of gravity
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Undergrad The uniqueness of D=4
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Undergrad Why do objects follow a geodesic?
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Undergrad Increase in surface charge density in different frames of reference
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High School General relativity and frame of reference
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Undergrad Line element in Kerr coordinates at singularity
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Undergrad Trying to Fully Understand Mass Increase of Unstable Bonds
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Undergrad Help understanding proof of ds=ds' in Classical Theory of Fields
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High School Nalini Joshi's Time Travel Ideas
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Undergrad Constants of motion symmetric spacetimes
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Undergrad Speed of information-carrying radiation
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Graduate Zeroth law of black hole thermodynamics
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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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Graduate Timelike curves on event horizon
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Undergrad Solution To Photon Trajectory Equation
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Graduate How to show spin ##= \pm 2/\omega## for a circ-polarized gravity wave
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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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Graduate Stationary solutions to Klein Gordon equation in spherical symmetry
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Graduate Exact meaning of the mass M in the Kerr metric event horizon formula?
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Undergrad Handshake paradox involving the Starship Enterprise
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Graduate Metric of the "space" of 3d rotations
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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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High School Can the same ruler have two different sizes?
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Undergrad Can Propeller Speeds and Wave Breaks Challenge the Speed of Light?
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Graduate Making sense of Dirac's rotation operator in "General Theory of Relativity"
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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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Graduate Inferring coordinate change from the form of the metric
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High School Can We Use Space/Time Fabric to See the Past?
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Graduate Merging timelike and spacelike surfaces
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Graduate Can gravitational energy be localized in the case of plane waves?
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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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Graduate New Adler book on GR: Why do these coefficients go to zero?
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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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High School Is this an Unavoidable Collision between 2 spaceships traveling at 0.6c each?
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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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High School What if we use a non physical reference point to measure an object's mass?
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High School Speed vs. time for our Galaxy and an Observer
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Graduate Quantum mechanics and frame dragging
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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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High School Which term of the Einstein equation is larger?
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Undergrad Can there be a maximum curvature of spacetime?
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Graduate Does deceleration cause linear frame dragging?
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Undergrad For a relativistic spaceship, what is the most recent news the ship gets from Earth?
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Graduate Where Can I Find Detailed Derivation of Teleparallel Gravity Field Equations?
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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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Graduate On the order of indices of the Christoffel symbol of the 1st kind
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Undergrad Deriving e=mc^2, how is it possible?
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High School In GR gravity, does "equal and opposite" still hold and what does that mean?
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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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High School Is crossing a black hole's event horizon possible?
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Undergrad How Does Mass Influence Spacetime Curvature?
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High School How fast are gravitational forces transmitted?
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Undergrad GPS system and general relativity
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High School Why do people care about vacuum solutions in GR?
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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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