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 Can the expansion of the Universe reduce the energy of a photon to 0?
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Undergrad Orbital Period In General Relativity
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Undergrad Strange index notation for linear transformation matrix
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Undergrad Israel Junction Conditions: Finding Continuous Metric Across Shell
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Undergrad Dark energy and conservation of energy
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Undergrad On the physical meaning of Minkowski's spacetime model
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Undergrad Why Does a Charged Box Exhibit Higher Inertia Due to Mass-Energy Equivalence?
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Undergrad Linearised gravity approach to Lense Thirring metric
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Undergrad Black Holes Colliding Exactly Head On
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Undergrad Transition of spherically symmetric gravitation
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Undergrad Questions about Hawking radiation and extremal black holes...?
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Undergrad Coordinate Transformation versus Change of Synchrony Convention
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Undergrad Einstein brother-in-law elevator
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Undergrad Bell's spaceship paradox
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Undergrad Ricci tensor from this action
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Undergrad How Relativistic Speeds Affect Time Perception on a Spaceship
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Undergrad Explanation for Galaxy Rotation Curves
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Undergrad One difference between GR and quantum mechanics
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Undergrad Move Stress-Energy tensor to the left side of EFE?
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Undergrad Would moving the mouths of a wormhole affect the internal distance?
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Undergrad Photon in a mirrored box moving in direction of travel
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Undergrad Battery life on VERY fast moving object
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Undergrad A problem in the equations for Einstein's Special Theory of Relativity
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Undergrad What is the fabric of space-time made up of?
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Undergrad Does the speed of light pop out of other theories than EM?
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Undergrad Why are rotated parallel axes still parallel?
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Undergrad How relative is the magnetic field of a current carrying conductor?
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Undergrad The answer for the total mass of the Universe?
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Undergrad Does potential energy curve spacetime?
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Undergrad Relativity of Simultaneity and Length Contraction
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Undergrad Mathematical problem with Schwarzschild spacetime?
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Undergrad Dirac comment on covariant derivatives
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Undergrad Deriving the relativistic rocket equation with exhaust efficiency
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Undergrad Lorentz Transformations Confusion
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Undergrad Newton Galilean spacetime as fiber bundle
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Undergrad Galaxy recession and Universe expansion
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Undergrad Is momentum conserved as a body falls through a gravitational field?
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Undergrad Does Kerr's argument against singularities apply to all black holes?
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Undergrad Doppler and Searchlight (Headlight)
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Undergrad Difference between the Shapiro Delay and time dilation?
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Undergrad Is the electromagnetic 4-vector indeed a 4-vector?
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Undergrad Is Relativistic Action for a beam of light = zero?
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Undergrad Spacetime expansion - time dimension expansion
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Undergrad Perceive Length Contraction VS Terrell Penrose
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Undergrad Light clock running faster than light?
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Undergrad Time dilation vs Differential aging vs Redshift
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Undergrad Question about length contraction
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Undergrad Teaching Minkowski diagrams effectively
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Undergrad Why "time part" represents energy in Four-momentum?
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Undergrad How do you resolve seeming contradictions in SR?
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Undergrad Proof of Invariance of Spacetime Interval
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Undergrad Potential energy and the gravitational field of a collapsing cloud of gas
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Undergrad Curved spacetime bulging in time direction
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Undergrad Question about electromagnetism and frames of reference
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Undergrad Question about Einstein's famous elevator experiment
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Undergrad Why doesn't relativity of simultaneity lead to a contradiction?
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Undergrad How Does Distance to Proxima Centauri Affect Simultaneous Events?
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Undergrad Energy conservation in general relativity
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Undergrad Speed of light after exiting a transparent medium
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Undergrad Alternative Ways to Realize Invariance: Lorentz Transformation
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Undergrad Simplified explanation of SR for relativity-denier
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Undergrad Seeing history when crossing event horizon
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Undergrad Are the Lorentz Transformations False?
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Undergrad Can someone falsify this analogy contradicting time dilation?
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Undergrad What causes time dilation and length contraction
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Undergrad Is the Idea of a Continuum Always an Approximation to the Physical?
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Undergrad Incomplete geodesics in a singularity, do they warrant quantum concerns?
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Undergrad Physical meaning of zero time metric
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Undergrad Tidal effects on event horizon of binary rotating BHs
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Undergrad EFE with cosmological constant
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Undergrad Question about full Lorentz transformation
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Undergrad How Can You Approach Steve Without Being Doppler-Shifted?
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Undergrad What was the role of frequency in the Michelson-Morley experiment's null result?
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Undergrad Does Light Travel the Shortest Path in Curved Space-Time Around a Neutron Star?
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Undergrad Isn't the speed of light tautologically 299792458 m/s?
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Undergrad The speed of one photon through a transparent medium
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Undergrad What is Earth's escape velocity?
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Undergrad Analyzing Time Dilation in a Spaceship-Mars Scenario
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Undergrad What Happens When an Object Accelerating Away from a Black Hole Stops?
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Undergrad How Does Special Relativity Affect Perceived Distances Between Planets?
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Undergrad Invariant definition of acceleration in Newtonian physics vs proper acceleration in GR
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Undergrad Interpretation of (X,T) coordinates in Kruskal diagram
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Undergrad A mirror behind the event horizon
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Undergrad Schwarzschild spacetime in Kruskal coordinates
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Undergrad Effects of magnetism on spacetime curvature, and implications
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Undergrad Equation of state for Einstein field equations
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Undergrad Principle of relativity and Galileo's group
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Undergrad Black hole singularity, a time-like surface?
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Undergrad Is it only experience that's relative?
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Undergrad Question about the reciprocity of time dilation
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Undergrad Question about time dilation symmetry
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Undergrad Is there a theorem that we can't see objects getting behind EHs?
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Undergrad How Do Interparticle Interactions Affect Buoyant Force in Gases?
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Undergrad Linearising Christoffel symbols
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Undergrad Intuition regarding Riemann curvature tensor
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Undergrad Lie dragging vs Fermi-Walker transport along a given vector field
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Undergrad Does the Alcubierre drive shorten distances?
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Undergrad Lentz superluminial solution, anything new on it?
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Undergrad From our reference frame, how would a black hole ever form?
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Undergrad Kerr disputes singularities in Kerr Black Holes
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