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 What Are Closed Timelike Curves?
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Graduate Massless Particles: At Rest & Why?
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Graduate Twins Paradox in a Quasi-Uniform Gravitational Field | A Sci-Fi Exploration
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Undergrad GRAVITY its time we figured it out.
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Graduate Understanding the Relationship Between Energy, Mass, and Momentum in Relativity
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Graduate Does massless particles experience gravity
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Graduate Riemann curvature tensor as second derivative of the metric
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Graduate How Does Photon Momentum Exist Without Mass?
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Graduate Does Light Bend Spacetime and Have a Gravitational Pull?
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Graduate What is the cause of spacetime curvature?
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Undergrad Do Clocks Run Slower in Weaker Gravitational Fields?
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Graduate Robertson-Walker metric in higher dimensions (and problematic Riemann tensor)
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Graduate Sum of the forces and torques = 0
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Graduate What exactly is stopping us from unifying GR and quantum mechanics?
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Graduate What is the Origin of the Spatial Metric in Non-Inertial Frames?
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Undergrad Speed of civilisation development
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Undergrad Relative Velocity: Henrik's Understanding
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Graduate Effect of acceleration on space-time fabric
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Undergrad What is the Reason Behind the Speed of Light?
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Graduate Is Time Travel Possible and Already Happening in Our World?
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Graduate How Do Covariant, Contravariant, and Mixed Tensors Transform?
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Graduate Matrix Representation of Tensors?
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Graduate Is the ds² Expression for a Uniform Gravitational Field Correct?
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Graduate A new angle on the Right Angle Lever Paradox.
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Graduate What's the G-forces in a black hole event horizon?
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Graduate Revised Twin Paradox: What's Wrong?
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Graduate Another Schwarzschild question
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Graduate Is this a valid derivation of E=mc^2?
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Graduate A question about the speed of light puzzles me
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High School Michelson-Morley experiment proves nothing
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Graduate Understand Einstein Hole Argument: Norton's Expln & General Covariance
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Graduate Gravitational Theory, Don´t grasp it.
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Graduate How is velocity defined in relativity and who measures it?
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Undergrad What Makes the Speed of Light So Special in Physics?
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Graduate Bends in Space-Time vs Invariance
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Graduate How are Coordinates Defined in General Relativity?
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Graduate Another speed of light question
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Graduate Do Extra Dimensions Really Matter Before String Theory?
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Graduate Derivative of metric tensor with respect to itself
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Undergrad How does Einstein's model explain the relationship between gravity and energy?
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Graduate How two clocks can each run slow in the other's reference frame
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Graduate Gravity in relation to mass & energy
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Graduate Two Easy Questions: Mass & Speed Limit of C
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Graduate Uniting quantum physics with the theory of relativity
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Graduate Another time dilation question
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Graduate What Happens When a Mechanism Reaches the Speed of Light?
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Graduate The hole argument and diffeomorphism invariance
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Graduate Behavior of light accelerating
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Graduate Velocity and proper acceleration
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Undergrad What Do We Understand About Gravity?
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Graduate Do Closed Timelike Curves Exist?
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Graduate Are There Any Neater Solutions for Notation Confusion in Metric Equations?
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Undergrad Time dilation also for accelarated motion?
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Undergrad Reexamining Time Dilation: A Perspective from Both Frames of Reference
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Graduate Define Electromagnetic Spacetime
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High School Gravity After Mass Conversion to Energy - Layman's Guide
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Graduate Why Does the Simultaneity Equation Use Gamma Squared?
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Graduate Why Does the Standard Model Not Account for the Mass of Potential Energy?
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Graduate Coming to terms with the velocity addition formula
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Graduate What motivated Einstein to develop GR?
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Graduate Thought Experiment: Spaceship, Photon, and Relativity Explained in Simple Terms
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Graduate Understanding the Kerr Metric: Solving for Delta and Lambda functions
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Undergrad Why is the Speed of Light Constant?
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Graduate Who Ages Faster in Relativistic Travel?
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Graduate Is the Shapiro Delay a Result of Space Curvature or Time Dilation?
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Graduate Space Dilation in General Relativity: Facts, Measurement & Sources
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Graduate Geometric Algebra and Spacetime Split: What are the Applications?
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Graduate SR and Light Clocks - Confused
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Graduate If the speed of light were zero
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Graduate How does relative motion affect the speed of light?
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Graduate Gravitational time dilation from two or four bodies
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Graduate Third postulate of special relativity?
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Graduate Question about pressure in GR
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Poincaré's 1900 paper on Lorentz's theory
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Graduate Gravitational Collapse: Is Mass Referring to Rest Mass?
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Graduate Backscattering of light at a black hole
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Graduate Accelerations at various distances.
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Graduate How Does Relativity Change at High Velocities and Small Distances?
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Undergrad Understanding Frames of Reference in Relativity
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Graduate Precession angle per orbit of perhelion precession mercury
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Graduate Could Gravity Be a Reaction to the Early Universe's Events?
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Undergrad The Mystery of Photons and Gravity
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Undergrad Why can't we go faster than 300,000 km/s?
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Graduate Matter travelling faster then light inside a black hole
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Graduate Speed of light Schmeed of light: things can travel faster
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Graduate Frequency change of a photon falling to earth
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Undergrad What Are the Key Differences Between the Three Dimensions of Space?
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Graduate Question about exhaust velocity and terminal velocity
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Graduate About the accelerating spaceship
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Graduate Symmetry in Travel and Time Dilation
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Graduate Matter tells matter how to move
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Graduate Pole and Barn paradox - close the doors for good
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Graduate Length contraction compression and Schwarzschild radius
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Graduate Understanding Einstein's Discovery: The Constant Speed of Light
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Graduate Can Light's Speed be Considered Constant if it Can be Slowed Down?
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Undergrad On the noton of reference frames force and acceleration
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Graduate Which expression for Relativistic Kinetic Energy is correct?
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Undergrad Causality Question: Is It Violated in This Scenario?
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Undergrad Why Is 'c' Used for the Speed of Light in E=mc²?
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Undergrad Why does light not pass through voids within atoms?
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