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 Twin Paradox: Will Car A Age Slower?
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Graduate Null geodesics of the FRW metric
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Graduate Does the weight of a relativistic mass change when measured on a moving scale?
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Graduate Black Hole Penrose Process: Understanding Negative Energy Condition
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Graduate Pound-Rebka Experiment: Accuracy & Data Availability
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Graduate Observable universe as a black hole
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Undergrad EMF Generated When Magnet Moves Linearly Across Its Field
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Graduate Is Classical Mechanics Wrong? A Horrible Proof of Its Inadequacy
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Graduate What Happens to Acceleration and Spatial Distances Near the Speed of Light?
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Graduate Static + Hypersurface Orthogonality
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Graduate Photon pressure within a black hole
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Graduate Where Does the Traveling Twin Lose Time in the Twin Paradox?
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Graduate Relativity of Simultaneity and the Perception of Time in Motion
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Graduate Gravitational Field of Moving, Rotating Globe: A Question
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Graduate Red Shift Q: Where Does Lost Energy Go?
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Undergrad Differences Between Doppler Effect Formulas: u & f´
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Graduate Does Relativity of Simultaneity Imply Movement Before Action?
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Graduate Light Experiments at IAP, Darmstadt: Einstein's Speculations
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Graduate Gravity: Not a Force but Curvature of Spacetime?
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Graduate How Does Time Dilation and Length Contraction Work in Special Relativity?
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View Einstein's Papers for Free on Princeton University Website
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Graduate Understanding the FRW Metric: Exploring Physical and Comoving Coordinates
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Graduate Extended Extreme Multiple Reissner Nordstrom Black holes
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Graduate Light Cone Coordinates Explained
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Graduate How to explain the curvature of space-time to students
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Graduate Analysis of the physics in Interstellar
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Graduate Does gravity field really exist?
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Graduate Understanding Microwaves: Their Function and Effects on Food in Space
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Graduate Uncovering the Constant C: Equal Mass Equals Equal Energy?
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Graduate Definition of gravity according to GR
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High School Can there be an area with no gravity?
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Graduate Geometry of Time Dilation
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Graduate Does the Twin Paradox Still Apply with Identical Acceleration Readings?
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Graduate Coordinate values of G can vary from standard value
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Graduate Could Laser Beam Shifting Enable Faster-Than-Light Communication?
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Graduate Determining Metric of Space-Time (H.P. Robertson 1949)
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Graduate How is the Faraday Tensor related to the 4-potential?
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Graduate Relativistic Effects On International Space Station (ISS)
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High School Einstein says objects do not fall to the Earth?
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Graduate Does wormhole create gravitational wave?
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Undergrad Can time dilation cause confusion in the twin paradox?
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Graduate Explanation of the following field equation
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Graduate How did Einstein derive the meaning of Schwarzchild's metric
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Graduate Israel Wilson Perjes Metric: Tetrad Formalism Reference
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Undergrad Time Dilation: Doubts & Questions Answered
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Graduate What Are the Speed and Energy Density Limits of Dark Matter?
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Graduate Were Hawking Radiation & Singularity Theorem Controversial in 1965?
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Graduate Einstein's Regret: Penrose Asserts on Relativity
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Graduate Black Holes: Does Bob Survive Falling In?
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Graduate Clarification of concepts: Tetrads (Vielbeins), etc
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Graduate Confusion about parallel transport
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Graduate Robertson-Poynting Effect & Relativistic Beaming
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Graduate Einsteins field equations us what type of index notation?
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Graduate Travel Faster than Light: Veritasium's Spinning Satellite Explained
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Undergrad Velocity & Mass: Does Speed Increase Gravity?
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Graduate Electromagnetic tensor and restricted Lorentz group
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Graduate Fermionic Fields in Einstein Field Equations | Explained
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Graduate Can Time Be Reversed by Traveling Faster Than Light?
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Graduate A question about wormholes and their typical representation
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Graduate Relativity: Can a Spaceship Become a Black Hole?
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Graduate Understanding Lorentz Group Generators: Derivation & Step in Eq 15
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Graduate Forces on High Velocity Object - Newtonian Formula
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Graduate Dark Energy: Is Stretching Space-Time the Answer?
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Graduate Gravitational Waves: Measurements & Experiments
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Graduate What is the Unique Metric Tensor in this Line Element?
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Graduate How are tidal effects explained by general relativity?
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Graduate Understanding Gravitational Red Shifting with a Solar-Mass Black Hole
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Graduate Understanding Simultaneity in Special Relativity
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Graduate Gravitational Time Dilation: Observing Planet Life
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Graduate Can Something Really Be "mass less"?
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Graduate In order to build a wormhole. .
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Graduate Doppler effect and speed of light as a constant.
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Graduate FTL & Causality: Understanding Time Travel
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Graduate What does "invariance of proper time" mean?
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Graduate A question of "Time" and pre-determination and has everything already happened?
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Graduate Can clock transport tell us anything important
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Graduate Is Grav & SR Time dilation additive?
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Graduate Big Bang: A True Singularity That is Coordinate Independent
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Graduate How can we combine metrics in a spacetime with multiple point masses?
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Graduate Time dilations on confusing situations
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Graduate Is Space-Time Dilation Just a Funny Concept or Does It Have Real Properties?
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High School Why would Earth move in straight line without sun's gravity?
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Graduate Detecting Gravity Waves: An Exploration of Using Them for Communication
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Graduate Gauss - Bonnet Gravity -> Curvature variations
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Graduate The modelling of space time through Riemann tensor calculus
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Graduate Does Length Contraction Imply Superluminal Speeds?
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Graduate Was Einstein lucky when not considering twin paradox as paradox?
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Graduate Doubt: Why Quadratic in Matrix but Power 4 in Einstein-Rosen Metric?
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Graduate What Causes the Unexpected Limit in Rindler Horizon Calculations?
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Graduate Difficulty in understanding the notation
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Graduate Why Does General Relativity Use Coordinate Systems?
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Graduate Light reflection in length contracted system
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Graduate Difference Between Natario & Alcubierre Warp Drives
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Undergrad Length contracting between objects
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Undergrad Time dilation -- light clock on a train thought experiment
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Graduate Quantum Tunneling: Can Photons Escape Black Holes?
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Graduate Disk rotating in a gravitational field, like a clock
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Graduate Can Going the Speed of Light Create Waste in a Vacuum?
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Undergrad Why Can't Objects Accelerate to Light Speed?
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Graduate What Happens to a Baseball Thrown from a Light Speed Ship?
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