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.
The Speed of Light: Comparing to What?
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Graduate String-mass near the speed of light
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Graduate Hovering in gravity makes curved space flat?
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Undergrad Why are the fundamental postulates of special relativity controversial?
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Graduate Quantum blended with a little SR
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Graduate Christoffel symbols in the Schwarzschild metric
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Graduate How Small Could the Universe Get in a Big Crunch?
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Graduate What are some suggestions for books on general relativity at the graduate level?
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Undergrad Settle a Dispute: Falling Objects & Relativity
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Graduate What causes the bending of space and time by concentrations of mass and energy?
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High School Can the equation E=mc^2 be used as a measurement tool?
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Graduate Is length contraction relative or absolute?
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Graduate A New Test of the Equivalence Principle?
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Graduate Maxwell equations and special relativety
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Graduate Answering Questions on Speeds & Waves in Relativistic Space
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Graduate Can an astronaut actually reach the singularity of a finite lifetime black hole?
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Graduate Does Traveling at Light Speed Reveal More of the Universe?
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Undergrad Solving Problem 2-8: Relative Velocity and Time Elapses
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Graduate Interpretation of GR: Change in Einstein's Understanding
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Graduate When do clocks on an airplane and on the ground differ by 1.0 s?
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Graduate Relativity and fuel consumption
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Graduate Answering Relativity Questions: Earth, Spacecraft, Lorentz Transforms
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Can Time Travel Solve Paradoxes and Alter Personal Histories?
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Graduate The Sled and the Hole Paradox in Special and General Relativity Explained
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Undergrad What is the relative speed of an object standing still on Earth?
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Graduate If Time and Space Are Relative Concepts, Then
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Graduate Interpretation of GR: Einstein vs. Contemporary Physicists
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Graduate Schwarzschild metric and BH mass
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Graduate Is Block Time in General Relativity Proof of a Fixed Future or Many-Worlds?
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Graduate The End of the Universe from the Outside In - as free-faller nears singularity
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Undergrad Is Gravitational Red-Shift a Valid Concept?
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Graduate Time & Acceleration: A Relativity Puzzle
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Graduate The Speed of Light: Relative to Us?
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Graduate How Does Earth's Rotation Speed Influence Frame Dragging Effects?
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Graduate How Do Time Cones Illustrate the Concept of Space-Time?
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Undergrad Evidence of length contraction
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Graduate Do Wormholes Require Antimatter Singularities to Function?
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Graduate Bee Swarm Relativity: Calculating Time with a Messenger Bee
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Graduate Spaceship accelerating inside a Black Hole
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Graduate Time Before Time: Physics Paper Clarifications
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High School Older faster if the universe wouldn't be expanding?
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Graduate There is only one True Singularity and It is at the Center
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Graduate What is a time-like killing vector?
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Graduate What is the Unverifiable Nature of Black Hole Internal States?
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Graduate Why does gravity rotate with the Earth?
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Graduate Change in relativistic momentum
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Undergrad Question about how we look at space
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Undergrad Gravitation Speed/Acceleration/Velocity
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Graduate Is Action at a Distance Compatible with Quantum Mechanics and Relativity?
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Graduate What software do people use for tensor manipulation in general relativity?
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Graduate E = mc^2: Identity or equality
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Graduate Is gravity really just acceleration? And what about gravitons?
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Graduate Where are we on gravitational waves/graviton?
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Graduate Calculating mass and speed from kinetic energy and linear momentum
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Undergrad Does Gravity Expand and Collapse or is it Always Present?
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Graduate Special Relativity. timespace correlation.
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Undergrad Is Einstein's Theory of Relativity Flawed?
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Graduate Can particles traveling near the speed of light create a time reversal effect?
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Graduate How Does Dark Energy Exert Pressure in the Universe?
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Graduate Event Horizon vs Singularity: Are They the Same Thing in Black Hole Physics?
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Graduate What Determines the Direction of Space Curvature by Mass in General Relativity?
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Graduate Time flow & Cosmic Background Radiation
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Graduate Question about expanding black holes
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Graduate Can two events be perceived in reverse order due to relativistic effects?
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Graduate Escape velocity outside event horizon
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Graduate Can a falling feather inside a rocket ship create a black hole?
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Undergrad Why Doesn't a Photon's Energy Knock Us Out?
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Graduate Conservation of energy in GR and symmetry
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Graduate Can an Accelerating Universe Rotate According to GR Principles?
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Graduate Into the past ?: Tricky SpaceTime Diagrams?
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Graduate Is This Explanation of Black Holes Accurate According to Mainstream Theory?
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Graduate Those who use relativistic mass and why
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Graduate Are There Any Alternative Models to Explain Gravity?
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Graduate Stresses in a rotating object?
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Graduate Measuring the Speed of Light from Distant Sources: How Do We Know It's Constant?
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Graduate Matter Forms Space & Time is Relative Motion
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Graduate So we have problems with clocks measureing time ?
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Undergrad How can we explain special relativity to skeptics?
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Undergrad Solving the Twins Paradox: Could Einstein be Wrong?
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Graduate Can an Arbitrary Co-ordinate System Be Used for Observers in GR?
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Graduate The fundenental law of relativity
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Graduate Oh My God Particle - Fourmilab
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Undergrad Is Time Travel Backwards Theoretically Possible?
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Graduate Solving a Random Equation: a=dt_o/t^3sqrt(1-v^2/c^2)
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Graduate Infinitie tidal forces at event horizon?
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Graduate What Are the Key Properties of Tensor Equations in General Relativity?
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Graduate Can Special Relativity's Equations Be Modified to Avoid Infinities and Zeroes?
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Graduate Calculating Relative Speed in 2D: Solving for Gamma with Two Spaceships
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Graduate Relativity Question: Two spaceships following each other near C
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What Would Sound Like at the Speed of Light?
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Graduate Spacetime and Euclidean Geometry-Jacobson
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Graduate Speed light travels on earth and in our solar system
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Graduate Question about the metric tensor in Einstein's field equations.
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Graduate Practical Use For Length Contraction?
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Graduate Can Humans See Bodies Traveling at the Speed of Light?
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Graduate Latest Developments on Black and White Hole-Theory and Anti-Gravity
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Graduate Matter <--> Energy Conversions: A Phase Transition?
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Graduate Can Matter and Energy Truly Be Annihilated According to Relativity?
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Graduate Do Gravitons Play a Role in Simulated Gravity on a Rotating Spacestation?
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Graduate Do Einstein's Theories of Relativity Contradict Each Other?
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