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 Question about length contraction
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Undergrad Teaching Minkowski diagrams effectively
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Graduate Can We Construct a Coordinate Chart Where Bell Observers Are At Rest?
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High School Could you use LIGO-technology to measure gravitational redshift?
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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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High School Time Dilation in Non-Stationary Reference Frame: A, B, C
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Undergrad Proof of Invariance of Spacetime Interval
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High School What do people mean when they say “space is flat?”
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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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High School Gravitational Time Dilation Inside the Sun
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High School General Relativity and Universal Gravitational Constant
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High School Question about "odometer" analogy and time dilation
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Undergrad Question about electromagnetism and frames of reference
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High School How to add an object's multiple relativistic speeds from x, y, and z?
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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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High School What is m in Kinetic Energy? Relativistic mass or Rest mass?
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Undergrad Seeing history when crossing event horizon
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High School Can we see 2 black holes orbiting each other?
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High School Does Space Recover or Oscillate After Being Distorted by Massive Objects?
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High School Black hole electromagnetic spectrum
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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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High School Does gravitational force act on system or its components?
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High School Where does the light energy lost due to expansion go?
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Undergrad What causes time dilation and length contraction
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High School A thought experiment regarding special relativity
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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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High School Would We See the Same Light After Traveling Back to Earth Faster Than Light?
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Undergrad Physical meaning of zero time metric
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Graduate Do Black Holes have Singularities?
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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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High School Black hole evaporation mechanism
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Undergrad How Can You Approach Steve Without Being Doppler-Shifted?
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High School Spacetime interval question involving a Pendulum in a Space Ship
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Undergrad What was the role of frequency in the Michelson-Morley experiment's null result?
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Graduate Is there a basic example that works based on gravitoelectromagnetism?
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High School Is the Accelerating Expansion of the Universe Wasting Energy?
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Undergrad Does Light Travel the Shortest Path in Curved Space-Time Around a Neutron Star?
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High School What Are the Relativistic Implications for Beacon Synchronization?
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Undergrad Isn't the speed of light tautologically 299792458 m/s?
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High School Question about Morin's time dilation explanation
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Undergrad The speed of one photon through a transparent medium
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Graduate Correspondence between areal radius differences and proper distances
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Undergrad What is Earth's escape velocity?
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Graduate How to Express the Schwarzschild Metric in Fermi Normal Coordinates?
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Undergrad Analyzing Time Dilation in a Spaceship-Mars Scenario
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High School How do you project a Killing Vector onto a Schwarzschild field?
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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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High School Is imaginary time a fourth dimension?
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High School Minkowski Spacetime vs Euclidean Spacetime
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High School Stationary charge next to a current-carrying wire
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Undergrad A mirror behind the event horizon
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High School What does the Minkowski spacetime interval represent and how is it determined?
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High School Very basic questions about visualizing spacetime
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High School Question about choice of reference frame
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Undergrad Schwarzschild spacetime in Kruskal coordinates
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High School Can Motion Exceed the Speed of Light in General Relativity?
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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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High School How to know what maximal atlas to use for spacetime manifold?
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High School What does symmetry of time dilation really mean?
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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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High School How does hawking radiation escape a black hole?
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Undergrad Is there a theorem that we can't see objects getting behind EHs?
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High School Intuition for time dilation in a cesium clock
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Graduate What Are the Must-Read Einstein Papers on General Relativity and Beyond?
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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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High School What Is the Fourth Dimension and How Does It Work?
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Graduate Negative energy in Hawking radiation
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Graduate Where exactly is the wormhole in the Kruskal-Szekeres diagram?
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High School A well defined thought experiment
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Undergrad Lentz superluminial solution, anything new on it?
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High School Question about the relative motion of an eye relative to light source
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High School Why Do Bob and Alice Disagree on Astronomical Measurements?
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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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High School Understanding the Twin Paradox: Simplifying with a Clear Experiment
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Graduate Model for Gravity -- What mechanism distorts space in the real case?
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Undergrad Is the instantaneous collapse of the wave function frame dependent?
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