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.
Undergrad Tensors: Bar Symbol Over Functions or Indices?
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High School Does the size of the Universe change with motion?
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Undergrad Principle of Equivalence: Are You in a Gravitational Field?
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Undergrad EFE: Deriving Speed of Gravity, Gravitational Waves?
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Undergrad Difference Between T_{a}^{b} & T^{a}_{b}: (1,1) Tensors
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High School Dark Matter & Quantum Gravity: Is Unknown Property at Play?
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Undergrad Circle tangential velocity approaching c
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High School Express Velocity in Formula: Find Answer
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High School Electric Field in Accelerating Elevator
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Undergrad Alcubierre Warp Drive: 2nd Law of Thermodynamics Impossibility?
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High School Einstein's Theories: Fact or Fiction? Research Q&A
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Undergrad Why special relativity is unsuitable to describe gravity
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Undergrad Levi-Civita Contraction Meaning: Undergrad Research
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High School Beginner Question: Causality & Relativity in Quantum Mechanics
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Undergrad 2as = v^2 an other equations dealing with the past
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Undergrad Still have questions about photon mass
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Undergrad Maxwell's Equations & GR: How Scientists Got Away With It
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Undergrad Local meaning of the equivalence principle
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High School Einstein's Thought Experiment on Simultaneity | Newbie Q&A
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High School Could frame dragging explain dark matter on a large scale?
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Undergrad Compton Scattering w/Moving Electron: Turner's Eq 5.29
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Undergrad Geodesic Deviation: Definition of Connecting Vector
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Undergrad Can an object be both a black hole and not a black hole?
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High School Relativistic Energy: Change of Consts. of Integration
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Undergrad Paradox: Electron Radiates in a Gravitational Field
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Undergrad Non-coordinate Basis: Explained
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High School Comparing Ages: Spaceship Rider vs Earthbound
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Undergrad Understanding Time Dilation and Differential Aging in the Twin Paradox
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Undergrad Can a Magnetic Field Create Gravity?
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Insights The Speed of Light and of Galilean Relativity - Comments
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Graduate Calc Magnitude of Proper Accel w/ 3-Vectors & 4-Vectors
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High School Maxwell's EM Theory vs Principle of Relativity
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Undergrad Equivalence Principle: Controversy & Misinterpretations
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Undergrad Reconciling Spacetime & Quantum Uncertainty
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Undergrad Commutator of two vector fields
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Undergrad Calculating different time frames
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Undergrad Black Holes: Draining Empty Spacetime?
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Undergrad Differential equation from derivative of time dilation
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High School Measuring the speed of light from moving source of light
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High School Speed of light circling around a black hole
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Undergrad Any database of results for the Michelson-Morley Experiment
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Undergrad What is the fastest time can go?
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Undergrad Gravitational time dilation - acceleration vs potential
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Undergrad Doppler Gravity: Does it Exist? Why or Why Not?
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Undergrad Is Time Travel Really Possible: Can We Move Backward in Time?
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Undergrad Einstein Proved Right 500M Light Years Away
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Undergrad Deriving Einstein Equations: Questions on Linearity & Symmetry
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Undergrad Force Experienced on a Curved Geodesic Path
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Undergrad Understand Relativity w/o Math: A Different Framework
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Undergrad Vectors & Frames Qs: Galilean & Lorentz Transforms
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Undergrad Real life example of the energy contained at E=γmc^2
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Undergrad How does the stress-energy tensor act on gravity?
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Undergrad Feedback Requested: Special Relativity Simplified by Phil
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High School Do photons interact with spacetime?
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High School What is the fabric of spacetime?
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High School Uncovering the Mysteries of Time: Understanding its Stretch and Rhythm
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Undergrad C Speed, Gravitational Time Dilation & 4-Velocity
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Undergrad Indices Up & Down: Understanding Dual Vectors
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High School Which Particle is Moving? Physics Q&A
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Undergrad Time Dilation: Does Gravitational Field Strength Matter?
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High School Derivative of the Lorentz factor
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High School Limitless Momentum of Black Holes
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Undergrad Doubt regarding derivation of Lorentz Transformations.
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Undergrad Restrictions of 1st Order Perturbation Theory
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Undergrad Learn Michelson Morley Exp: Best Books Explaining Light's C Speed
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Undergrad Kruskal–Szekeres coordinates for Kerr metric
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Graduate Pressure and Newtonian potential energy
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High School Einstein's Cosmological Constant: Push or Pull?
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Undergrad Relativity of Time for Two Observers
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Undergrad Diffuse Reflection: Calculating Momentum Transfer
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High School What the movie Interstellar got right and wrong?
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Undergrad Metric for Single Photon: What's Best?
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Undergrad Energy Radiated by Object Falling in Black Hole
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Undergrad Can someone fact check my speech about BH?
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High School Are Geometries that contain Closed Timelike Curves Possible?
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High School Thought Experiment from my daughter regarding black holes
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High School Can Causal Loops and Time Travel Coexist?
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High School Real-Life Demonstrations of Black Holes for Video
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Undergrad Does gravity impact the speed of light?
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High School Closed Time-Like Curves: Principles & Observations
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Graduate Kottler-Moller coordinates, metric "covers" a region
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Undergrad Can someone explain this phenomena?
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Undergrad SR Time Dilation in Rigid Structure Clocks
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Undergrad Why is Hawking Radiation Unequal for Matter & Antimatter?
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Undergrad Consequences of light moving in a medium
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High School Frame Dragging: Q&A for Time Travelers
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Graduate How are curvature and field strength exactly the same?
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High School Layman's Question about Special Relativity
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Undergrad Confusion regarding acceleration in SR
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High School Gravitational Redshift: Will Two Lasers Operate Differently?
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Undergrad Killing vectors in isotropic space-times
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Undergrad Uncovering Invariance in SR: Why is $0 = (cdt)^{2}-dx^{2}$ Invariant?
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Undergrad How Does General Relativity Explain Gravity's Conundrum?
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Undergrad Understanding the Relationship Between Energy and Momentum in Special Relativity
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Undergrad Solving for the Missing Factor: Jumping into a Non-Rotating Black Hole
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Undergrad How does gravitational time dilation work?
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High School Effects of a moving mirror on a ray of light
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Undergrad Can Light Transfer Momentum to Create Sound in Air?
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Insights Lessons From the Bizzaro Universe - Comments
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Undergrad Can the Christoffel connection be observed?
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