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 Black Holes: Event Horizon, Singularity & Information Loss
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Graduate Need help reproducing geodesic DE from a paper
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Graduate Einstein's Theory of Relativity: Why Planets Orbit Quicker Near the Sun
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Graduate Quick Question about the Christoffel Symbol of the Second Kind
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Graduate Monkey and Hunter Problem - General Relativity?
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Graduate Proper Acceleration and Christoffel Symbols
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Graduate Rohrlich's derivation of E=mc2 wrong?
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Undergrad What is Lorentz transformation?
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Graduate Faster than light relative speeds (I know it's impossible)
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Graduate Locally inertial coordinates on geodesics
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Graduate Is Papapetrou line element the same as cylindrical coordinates?
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Graduate Justification of length contraction in light-clock presentation
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Graduate SR and speed of light in matter
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Graduate Gravitomagnetism: Why isn't mass-current covariant?
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Undergrad Who Ages Faster in the Twin Paradox?
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Graduate Initial Acceleration of Photons
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Graduate Will we measure the velocity c?
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Graduate What are the consequences of violating (or almost) speed c
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Graduate How Can a Magnetic Field Generate an Electric Field Without Experiencing Time?
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Undergrad Does Time Dilation Occur When Orbiting Around a Planet?
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Graduate Problem with Understanding Dimensions
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Graduate Spin Density and Non-symmetric Stress-Energy Tensor
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Graduate Is length contraction direction independent?
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Graduate Top Free Mathematica Packages for Calculating GR Tensors and Derivatives
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Undergrad Does Relativistic Speed Increase Gravity Pull?
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Graduate Travelling close to the speed of light
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Graduate Time Dilation: Self-Consistency Problem Explained
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Undergrad Everything attracts everything else; F = GMm/r^2. If two objects are
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Graduate Observing a Galaxy in a New Way: 100,000 Lightyears Across
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Graduate Gravity waves, how big are they?
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Graduate Do all four-vectors live in a tangent space?
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Undergrad Time Dilation Vs. Length Contraction
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Graduate What would happen if the speed of light was 1000 times greater?
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Undergrad Formula for light deflection in elevator
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Graduate Synge's World Function: Explained & Needed
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Graduate Causality Violation in Extended Newton's Cradle?
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Graduate Definition of Frame of Reference
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Graduate Can Spaceship A Destroy Spaceship B at 99.99% the Speed of Light?
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Graduate How to derive t1 in terms of t and t in terms of t1
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Graduate Confused with directional derivative definition of vectors
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Graduate Rotation speed near light speed increasing gravity?
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Undergrad Is this a truth and its evidence?
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Graduate Asymmetric stress tensor gives asymmetric stress-energy tensor?
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Graduate Who came up with the Light Clock Thought Experiment
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Graduate Time dilation when falling into a black hole
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Graduate Does time dialation cause mass reduction in GR?
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Graduate My Particularly Troublesome Version of the EPR Paradox
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Graduate Fluid Tensors and the Cosmological Constant
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Graduate Four-Dimensional Vector in Special Relativity
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Graduate Variation of Laplace-Beltrami wrt metric tensor
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Graduate Generalizing the special principle of relativity?
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Graduate Why Do We Use Light Signals to Measure Time?
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Graduate Can Torsion Exist in Two Dimensions from a Differential Geometry Perspective?
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Undergrad Time & Space: Is One Relative to the Other?
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Graduate 'Symmetrisation Notation' - What is it?
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Graduate How massive does a planet have to be to cut time in half?
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Graduate Photon Clock & Time Dilation: Rotating the Clock 90 Degrees
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Graduate Foundations of General Relativity Text - Recommendations
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Graduate Could Gravity Transport Energy?
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Graduate Twin paradox on another planet
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Graduate Why don't objects in orbit fall into the center?
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Graduate Time dialation in different parts of a fast moving rocket
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Undergrad Is time still affected (slowed down) at the center of the earth?
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Graduate Time dilation by homogeneous distribution of massive objects?
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Graduate GR: Gravitational Forces Represented by Christoffel Symbols
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Graduate Observer Frame of Reference
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Undergrad Can someone please explain to me how space-time works? Is space-time a
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Graduate Understanding Proper Length in Special Relativity
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Graduate Upper limit on the characteristics of Singularity
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High School Question About Time and the Speed of Light
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Graduate Gravitational Waves: Speed & How Objects Affect it
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Graduate Trying to understand relativity
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Graduate Can You Travel Faster Than The Speed Of Light?
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Graduate Minkowski Inner Product and General Tensor/Matrix Question
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Graduate Time Dialation and Biological systems
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Graduate Curvature of Time: Measuring Change in XYZ Axis
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Undergrad Is Gravity a force, or not a force?
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Graduate A Relativity-Related Thought Experiment that has Given me Trouble
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Undergrad Predictions we can derive if light were corpuscular
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Graduate Is Light's Medium the Luminiferous Aether or the Electromagnetic Field?
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Graduate Does relativity restrict velocity relative to an observer?
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Graduate How did Lorentz come up with his ether theory?
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Undergrad Is Backwards Time Travel Possible or Just a Paradox?
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Graduate Einstein: Balancing 3D Positions & Time in E=mc2
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Graduate Is the Constancy of Light in Vacuum a Proof or a Postulate?
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Can We Really Stop Time and Change Our Past?
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Graduate Physical Effects of ball moving at 0.9c
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Graduate Why are mass, length, and energy relative?
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Undergrad Relativity of simultaneity and doppler effect
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Graduate How Does Hartle Derive the Equation from Arc Length to a Trigonometric Integral?
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Graduate Lorentz covariance and Noether's theorem
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Graduate If you could travel faster than light
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Graduate Interpretation of Einstein's E=mc2 paper
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Graduate I'm sorry, I don't understand what you are asking for. Could you please clarify?
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Graduate Do Free-Falling Charges in a Static Gravitational Field Radiate?
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Graduate Confused about the metric tensor
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Graduate Why do blackholes cut off from the rest of the universe
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Graduate Understanding the Lorentz Group: What does O(1,3) mean?
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Graduate Does light experience time and space simultaneously?
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Graduate Understanding Relativity: The Constant Speed of Light Phenomenon
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