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 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 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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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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Undergrad When Does a Train Passenger Experience Complete Darkness in a Tunnel?
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Undergrad Matrix form of metric component transformation?
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Undergrad Energy and reference frames
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Undergrad GR as Gauge Theory
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High School Can we say that everything on the planet is made up of energy or matter?
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Graduate A better way of talking about time?
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Undergrad Are Space and Time Just an Illusion in General Relativity?
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Graduate Curvature with different connections on the two-sphere
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Undergrad Determinism & General Relativity: A Physics Primer
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Undergrad Transformation Riemann tensor to an accelerating frame
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Undergrad SR: GA Multivector vs. Tensor notation, Maxwell's equations
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Undergrad Time dilation for two observers in relative motion
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Undergrad Electromagnetic field in different reference frames
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Graduate Speed of Light for Bonnor Beam
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Undergrad Time dilation and the human body
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Undergrad If electrons can be pointlike particles, why can't black holes?
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High School Is time travel... travelling from one 3 dimensional space time to another 3 dimensional space time?
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Graduate Is Fatio–Le Sage's theory of gravitation an entropic gravity?
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High School Is time an illusion?
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High School Can we measure absolute motion of Earth and Sun?
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Undergrad Definition of tangent vector to a timelike geodesic
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Undergrad Tensor field from a covariant derivative operator (affine connection)
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Undergrad Can anyone clarify the relativistic twin paradox for me?
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Graduate Calculating geodesic equation from Hamiltonian in presence of EM
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Undergrad Why does laser beam hit the same target when fired?
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Undergrad Lorentz transformation on mode functions
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Undergrad A six-vector is related to a 2nd rank antisymmetric tensor in Minkowski Spacetime?
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Undergrad Is the weak field limit valid for the Brans-Dicke scalar field?
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Undergrad Robert B. Laughlin (Physics Nobel Laureate, Stanford University)
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Undergrad What about the Big Ben Paradox?
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Undergrad Using 4-derivative
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High School Special relativity thought: Traveling to the future relative to a particle
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High School Imaginary distance is nonsense
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High School c^2 in Einstein‘s theory of relativity
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Graduate Special Relativity in Rotating Reference frame
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Undergrad A question about the speed of light and electromagnetism
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Undergrad The Lorentz factor gamma and proper time
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Undergrad Can the intersection point of two light beams exceed the speed of light?
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Undergrad Need opinions on Youtube video: "From constant moving charge to SR"
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Undergrad A thought experiment on simultaneity
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Undergrad Speed of Light & Bullet
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Undergrad Question about length contraction and repulsive force
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Undergrad A matter of time dilation: how much time has actually passed?
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Graduate Different time coordinates due to different velocities
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Graduate Can We Flatten Space with York Decomposition?
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High School Question about the Entropy of a Black Hole Singularity
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High School But how does something start moving?
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High School Events vs Effect of Events in Relativity of Simultaneity
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Undergrad Speed of light one more time
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Undergrad Principal and Gaussian curvature of the FRW metric
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High School How does Einstein's equation work? Why do we need to square c?
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Insights Addition of Velocities (Velocity Composition) in Special Relativity
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Undergrad Physical Difference Between Co- and Contravariant Vectors
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