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.
High School Struggles with the geometrical analogy
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High School Verifying Time Effect of Gravity: Accurate to a Few Thousands of a Percent
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Undergrad Computer Performance Evaluation (CPE)
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Undergrad Why is the Energy Momentum Tensor of a Perfect Fluid a Tenso
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High School Understanding Special Relativity: 2nd Year SR Course Explained
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Undergrad Do we have to accept the physical existence of time?
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High School Einstein's definition of synchronization
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High School I got confused about SR after trying to reply to another
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Undergrad Einstein & Relativity: Metric, Tensor Fields, Scalar Product
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High School Time Dilation Theory Flaw: How Can They Be Different Ages?
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Undergrad Confusion about Einstein notation
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Graduate Distinguishing Riemannian Manifolds by Curvature Relationships
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High School Big Bang Theory: If There's No Center, How Is Universe Infinite?
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High School Does Energy Have Mass and Other Beginner Physics Questions?
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Undergrad Solve General Relativity Equation: Steps & Tips
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High School What is wrong with gravity equations?
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Undergrad EM Lagrangian: Question on $(\partial_\mu A^\mu)^2$ Term
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High School Does time dilation prove the existence of an absolute zero velocity?
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High School Gravitational waves of moving or vibrating masses
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Graduate Electromagnetic tensor and time reversal
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Undergrad Favorite Visualization of General Relativity?
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Undergrad Connection between entropy and time travel?
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Undergrad Is the Speed of Light Bidirectional in an Expanding Universe?
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High School Special Relativity & Acceleration: Unequal Inertial Frames
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Undergrad Acceleration vs Gravity in General Relativity
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High School Velocity Addition Q: Ball Thrown from Moving Ship?
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Graduate Killing vector notation confusion time translation
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Undergrad Escape Velocity: Newtonian vs Relativistic
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High School Learning Lorentz Derivation: Solving x=vt+γx' vs. x=vt+x'/γ
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Undergrad Why Not Develop Relativistic Gravitational Theory Analogy to Electromagnetism?
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High School What is the meaning of the famous equation E=mc^2?
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Undergrad Killing Equation: Why Set g_μν,ρ V^ρ = 0?
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Undergrad Lorentz Transform of E and B: Considerations by DJ Juggernaut
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High School Is the Lorentz transformation about observers?
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High School Moving Charge in a Magnetic field Problem
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High School Basic Lorentz transformation derivation
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Undergrad Time dilation for the Earth's orbit around the Sun
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Undergrad Gaussian normal coordinates and Riemann normal coordinates
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High School Is the Andromeda Paradox accepted in physics?
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Undergrad Proving Geodesics in Hyperbolic Geometry
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High School Near Light Speed Runner: Will We See the Light?
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Undergrad Connection Types: Affine vs Non-Affine
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High School Which Watch Will Have Slower Time: Object 1 or Object 2?
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Undergrad Gravitational Effects on Age of Earth's Core
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Undergrad Bijectivity of Manifolds: Can m≠n?
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Undergrad Why are direct sums of Lorentz group representations important in physics?
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Undergrad Displacement vector in general relativity
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High School Is Spacetime Really a Block Where All Moments Exist Simultaneously?
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Undergrad Time dilatation thought experiment
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High School Is the speed of light constant to all observers?
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Undergrad Newtonian analogue of energy-momentum relation?
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Undergrad Motion of Null, Timelike & Spacelike Particles
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Undergrad Why Don't We Detect Gravitational Shadows?
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Undergrad Measuring Star Radii with General Relativity
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Undergrad Are wormholes and tachyon fields unified?
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Undergrad Writing Metric in Matrix Form: Method?
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Undergrad Convert Metric Tensor to Gravity in GR
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Undergrad Does S-T Curvature Change Particle Shape?
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Undergrad Are All Particle-Rest Inertial Frames the Same?
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Undergrad Is current in a wire frame-specific?
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Undergrad Is energy-momentum invariant and/or conserved?
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High School Why does a LIGO arm stretch and not move in unison?
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Graduate Hawking and Unruh effects -- Differences and interpretations
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High School Lorentz Invariant Paths in Spacetime
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Undergrad How Many Gravitons Were Detected in Recent Gravity Wave Observations?
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Undergrad Electric & Magnetic Fields Inside Conducting Wires
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Undergrad Quantum Mechanics in Spacetime: Is it Discrete?
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High School Another spaceship and two points question....
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Undergrad GR vs Newtonian Physics: Mass Curving Spacetime & Gravity Effects
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High School Does Negative Mass Have Physical Significance in Modern Theories?
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Undergrad Modern Definition of Mass: Does a Photon Have It?
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Undergrad Inertial Frames: Constant Quantities?
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High School Gravity Deflects Light & Massless Particles: Einstein & Susskind
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Undergrad Is Mathematics a Paradigm of Truth in General Relativity?
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Undergrad Can Black Holes Store More Information Than We Think?
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High School What Theories Explain the Black Hole Paradox?
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Undergrad Black Hole Stability Conjecture: Why Is It Important?
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Undergrad Intuitive explanation for Riemann tensor definition
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High School Math-Based Time Dilation Paper: Seeking Suggestions
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High School Questions about the relativistic kinetic energy expressions
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High School How do physicists know that the past is immutable?
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High School Time Perception: Is It Different from Time Dilation?
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Graduate Energy distribution on Alcubierre walls
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Undergrad Why is Displacement Current Excluded from Four-Current?
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Undergrad Deriving Lorentz Transformation
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Undergrad Gravitational time dilation derivation
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High School Tidal Forces When Falling into a Black Hole
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High School Observing a Beacon Impact a Neutron Star/Event Horizon
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Undergrad If time doesn't pass at the event horizon, how is it crossed?
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High School Can Closed Timelike Curves Violate Entropy by Allowing Time Travel?
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High School Do Open Timelike Curves Exist?
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Undergrad Weyl Transformation of Metric: Cosmological Inflation
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Undergrad How do you draw a spacetime diagram and what equation describes it?
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High School What would happen if the speed of light were different?
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High School Closed Timelike Curves vs Time Loops: What's the Difference?
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Undergrad Transforming Contra & Covariant Vectors
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High School Is it possible to experience time loops?
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Undergrad Is the Schwarzchild Radius Relativistic or Newtonian?
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Undergrad Detecting Crossing Event Horizon w/ "Closed Box" Experiment
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High School Deriving Energy and Momentum in GR: 4-Component vs. Tensor Approach
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