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.
Do Photons Have Infinite Energy at Light Speed?
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Gravity/conservation of energy?
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Question on Curvature of Space
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Why EFE Satisfy Empty Space in 2-3 vs 4-D+ Dimensions
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Brightness detected based on direction of travel relative to source
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Why torsion free metric compatible connection ?
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Modelling Einstein's Thought Experiments (Trains + Mirrors)
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Time dialtion tick tick skeptick
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Why is synchronizing clocks important?
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Crackpot argument on Physicsforums gets published?
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How Does Acceleration Relate to General Relativity and Spacetime Curvature?
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Why Does Hamilton's Function Equal Zero in Relativistic Lagrangian?
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Is the Speed of Light Truly Constant in a Vacuum?
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SR Limit Problem: mcc/sqrt(1-uu/cc)
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Gravity: real force or artefact of acceleration?
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Looking for complete explanation of logic behind relativity
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Einstein's papers translated to english?
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Can Lorentz Contraction Exceed Light Speed?
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Relativity, the flow of time and speed
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Does Hubble's Law violate special relativity?
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Can Two Black Holes Merge and Reverse into Regular Matter?
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A rocket can't travel faster than the speed of light
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Question about events inside black holes
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Boosting EM Field Tensor: Lorentz Invariance & Potential Effects
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A question with the readings of synchronized clocks
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Special Relativity, Existence, and Big Bang
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De Broglie & Light: My Doubt - Einstein's Calc
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Speed/Aging Theory: Is a 4D Universe Moving at c?
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Can a Particle Reach Light Speed at r=3M in a Schwarzschild Black Hole Orbit?
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What does curvature of spacetime really mean?
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Wormholes, parallel universes, negative mass
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Lorentz transformation active or passive？
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Do Standing Waves Exist in General Relativity?
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Paper discussing the mathematics of relativity
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Invariance of combinations of physical quantities
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Maxwell's equations in higher dimensions.
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Speed's influence on space time
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An honest question about time dilation in SR
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Does a gravitational field have mass?
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Limit to strength of electron magnetic field
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Galileo's experiment and Equivalence Principle
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What Happens to Baseball When Light Speed is Just 88 MPH?
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Thermodynamics and Relativity: observing gases, rel. effects
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Twin Paradox: Simplifying Physics for Age Difference Explanation
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Time dilation, length contraction
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DEC with E/M and scalar fields
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Chasing a Beam of Light: Understanding Special Relativity's Thought Experiment
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Relativistic Paradox: Particle A vs B Decay Rate
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Why Do Sound Signals Appear Simultaneous in Einstein's Train Thought Experiment?
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Speed of Light and the Causality Problem
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What convervation law is required by the Lorentz Transformations
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Flat-space picture of gravity vs. General Relativity
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Fizeau, 1851, drag coefficinet
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Relativity Express: Einstein's Train Thought Experiment
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Research on general relativity
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What are Manifolds? Understanding the Continuum in Mathematics and Physics
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Frame dragging effects on speed of light
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Does kinetic energy vary by frame of reference?
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Total energy/mass in stationary GR
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Why the Reasoning is Wrong: Explaining the Mistake
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Theories of Gravity: Explaining the Perihelion of Mercury's Orbit
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Understanding the Four Momentum of a Relativistic Field
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On the Notations of Length Contraction and Time Dilation
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Relativity and Electromagnetism
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Constraints on metric coefficients in General Relativity (GR)
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How Does Speed Affect Time Dilation in Relativity?
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Effect of gravitational potential on energy
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Why Do We Measure Distances in Light Years Despite Time Dilation?
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If such an object does exists
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Magnets (and other things) at the speed of light
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Relativistic Effects: Particle Accelerators & Speed of Light
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What are the best free software options for visualizing relativity concepts?
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Question about going faster than speed of light
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Relativistic mechanical index of refraction
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Understanding Light: Frequency vs Wavelength in Different Mediums
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Understanding the Energy of Light: Unraveling the Mystery Behind 1/2mc^2
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Speed of light - can it be exceeded?
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Calculating Relativistic Rocket Performance
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Understanding Relativity to Explaining Time Dilation
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Light vs Light: What Does it Look Like?
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Information traveling faster than light?
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Differential Geometry/Topology in GR: Research Needed?
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Christoffel Coefficient Defined: Exploring Beyond the Metric Tensor
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How to Prove Lorentz Invariance of Volume Element in Momentum Space?
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Can we slow down a photon's velocity to 0?
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Inertial dependence upon local matter
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Defining Special Relativity & General Relativity
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Understanding SR/GR: Tips and Tricks for Intuitive Comprehension
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Relative speed of tachyons greater than c?
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What would happen if a spinning space station reached the speed of light?
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Is the Spacetime Interval Truly Invariant Across Different Reference Frames?
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Twin Paradox: Why Twin On Ship Ages Slower?
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General newbie questions regarding the speed of light
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Koide and Kodama on relativistic brownian motion
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Dude, where's my anti-graviton?
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Can Kindergarten STR Math Solve Polchinski's Paradox?
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C independent of observer and emitter
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How would you observe outside events on a spacecraft?
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How can we calculate a rest mass?
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About the Non-paradoxicality of the Twin Paradox
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