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 Why doesn't the vertical light beam get out of a black hole?
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Graduate Does Gravity Expand Space? Einstein's Theory Explained
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Graduate Using Light as a absolute frame of reference?
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Graduate Time Dilation: Photon Reflecting Surface Experiment
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Graduate Einstein-Hilbert action origin
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Graduate Clarification on synchronous clocks
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Graduate How to prove that something is a non-curvature singularity?
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Graduate Understanding Invariance of Spacetime Intervals
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Graduate Falling Through a Hole in the Earth: GR Effects on Motion
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Graduate What Would Happen if 2 People Were 1 Light Hour Apart?
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Graduate Momentum in special relativity
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Graduate What's the 3d equation of the Alcubierre warp?
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Graduate What is the relativity of simultaneity measuring?
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Graduate Traversable wormhole without negative energy (paper)
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Who Really Discovered Time and Its Origins?
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Graduate 4 velocity in Schwarzchild metric
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Graduate Spotting Errors in Transverse & Longitudinal Accelerations
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Undergrad Relative Time in Space: What Speed for 1 Day Equals 1 Day on Earth?
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Graduate Help with Twin Paradox: Understand Contradiction
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Graduate Time Dilation by Light Alone? A Software Engineer's Exploration
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Graduate Observing the event horizon of a black hole
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Graduate Inertial observers explanation for unruh thermalization
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Graduate Muons hitting Earth half-life explanation in SR
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Graduate What is the true nature of time and space for a photon?
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Graduate Travel to Light Speed: Acceleration & Deceleration
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Undergrad Why is the Constant in Mass-Energy Equivalence C^2?
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Graduate Do gravitational waves propogate slower when blocked by mass
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Graduate Can time dilation be explained by changes in the rate of entropy?
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Graduate Why the Delay? Uncovering Black Hole Reactions
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Graduate Does acceleration curve spacetime?
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Graduate Is Gravity Really the Weakest Force in the Universe?
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Undergrad Why does a black hole get bigger when it consumes mass?
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Graduate Problem with Purcell's model of electromagnetism
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Graduate Time Dilation: Explained for Twin Paradox
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Insights Time Dilation and Redshift for a Static Black Hole - Comments
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Graduate Gravity, Time Dilation & Black Holes: Q&A
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Graduate Redshift effect And photon energy loss
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Graduate Proving Non-linear Wave Equation for Riemann Tensor
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Graduate Barut's Electrodynamics Identity Problem
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High School Electromagnets are a relativistic phenom?
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Graduate Very precise Michelson-Morley experiments
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Undergrad What is the 2D Concept of Spacetime and How Does It Work?
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Graduate What is the interpretation of a Misner string in Bonnor's theory?
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Undergrad Struggling with the Special Relativity and simultaneity
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Graduate Proving "Rotation Matrix is Orthogonal: Necessary & Sufficient
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Graduate Time Dilation & Acceleration: Leaving Earth Effects
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Undergrad Does time depend on speed; or on velocity?
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Graduate Calculating Total Time Dilation in a Falling Photon Experiment
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Graduate Space-Time Curvature: Evidence of Mass Effect?
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Undergrad A Question about the empirical evidence of time
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Graduate Gravity's Effects on Light: Why Light Doesn't Always Follow a Straight Line
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Graduate Orientability of Null Submanifold w/ Boundary - Stokes' Theorem
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Undergrad Why is special relativity a local phenomenon?
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Undergrad How Einstein believed that space is curved?
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Graduate Double covariant derivative of function of scalar
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Undergrad Lorentz Transforms & Distribution Funcs: Physics Intro Help
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Graduate How Does Einstein's Corner Term Challenge 5D General Relativity?
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Graduate Is Lorentz Contraction Specious for Photon Traversal Time?
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Graduate Witness the Sky of an Accelerated Black Hole
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Graduate De Sitter space, basic questions
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Graduate Why Don't Probes Approach Each Other at 1.5c in Relativity?
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Graduate Measuring Time: What Does it Mean?
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Graduate Are Gravity Waves Distortions of Space-Time That Create Gravitons?
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Graduate Inertial & Non-Inertial Frames: Laws of Physics Explained
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Graduate Need help understanding electromagnetics and relativity
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Graduate Is Gravity a Force or the Deformation of Space?
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Undergrad Black Holes - Spaghetification countered by time dilation?
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Insights Does Gravity Gravitate? Part 3 - The Wave - Comments
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Undergrad Why is E=MC^2 such a neat and simple formula?
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Graduate Could a massive gravitational field influence the speed of light?
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Graduate Time dilation - Is the time between events longer or shorter
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Graduate Can objects contract faster than the speed of light?
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Graduate Why does Mercury have an elliptical orbit?
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Undergrad Simultaneity: disagreement, in the same reference frame
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Graduate Creating Realistic CTCs in GR: Is it Possible?
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Graduate Basis vectors of Minkowski space
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Undergrad Mass-Energy Relation: Burning Wood & Speed of Light
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Insights Does Gravity Gravitate? Part 2 - Comments
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Graduate Objects at Speed of Light: Time Dilation on Stop
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Graduate SR & Lorentz Scalar Fields: Covariant Diff. & Wave Amplitude
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Graduate Second postulate of SR quiz question
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Graduate Understanding Einstein's Derivation of EM Transformations
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Graduate Can Energy-Mass really be conserved ?
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Graduate Wormholes, Gravity & Interaction: Can a Star Pull a Planet?
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Graduate Light Travel: How Can It Move Without Time?
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Graduate Tidal Forces in Accelerating Frames
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Undergrad Question about Relativity: Speed Through Space & Time
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Graduate Black Holes & Light: Can Light Escape?
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Graduate Model Mercury Orbit w/Relativity: Force of Gravity Calc Explained
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Graduate Mechanism to Prevent Mass Increase from Information Dumping into Black Holes
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Graduate Finding Function that Vanishes Only When x^mu = y^mu
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Graduate Are frames in physics necessary?
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Graduate Sign of Kretschmann Scalar in Kerr Metric
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Graduate Non-Static Spacetime: Is It an Approximation?
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Graduate Gravitational Lock in GR: Earth-Venus Positioning
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Graduate A problem with polar coordinates and black hole
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Graduate General Relativity & Differential Geometry Q&A
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Graduate Questions After Reading "The Beginning of Infinity" by David Deutsch
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Graduate Laws of physics in noninertial frames
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Graduate GR Schutz: Why r Must Decrease in Black Hole Section?
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