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 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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Graduate Spacetime: How It Is One & How It Moves
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Graduate What is the Significance of 4-Velocity in Special Relativity?
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Undergrad Speed of Light & Red Shift: My Understanding
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Graduate Light Speed Photon: Everywhere at Once?
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Graduate Big Bang: Spacetime Created in 1 Sec
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Undergrad Understanding Einstein's Theory of Relativity: Laser Technique Questions
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Graduate Distinguishing Special Relativity from Classical Mechanics
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Graduate An atomic clock and a normal clock
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Graduate Problem with a piece of calculation
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Graduate Mass Inflation in BH: A Depreciated Concept?
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Graduate Is the speed of light truly constant?
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Graduate Help with Lorentz Transformation Notation & Matrix Entries
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Graduate Gravity: Examining Force, Magnitude, & Limitations
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Graduate Time Real or Not? - Arguments For & Against
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Graduate Length contraction of particles
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High School I have a dumb question about gravitational fields
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High School Can Meeting Your Future Self Create a Time Loop?
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Graduate Free fall into BH and horizons
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