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 Can an observer perceive he is traveling faster than light?
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High School Multiple Curves in Space-Time: Masses on a Trampoline
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Undergrad How does the motion of colliding billiard balls change under Special Relativity?
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Undergrad Calculating Velocity: Moon Around Earth & Clocks in Burj Khalifa
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High School Gravitational Time Dilation: Math Formula for Clock-Slowing Factor
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Undergrad Hash marks on minkowski diagram
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Undergrad Derivation of Rindler Metric and How It Resolves the Twin Paradox
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Undergrad Does the Invariance of Proper Time Lead to the Lorentz Transformation?
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High School Black Holes Collide at 0.999c - What Happens?
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Undergrad Is There a Preferred Direction in Time?
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Undergrad Non-inertial reference frames question
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Undergrad SR Light Wavelength & Direction: Questions Explained
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High School Refined Interpretation of Relativity of Simultaneity?
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Undergrad Time Dilation Explained: Feynman Lectures 15-4
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High School What if light were influenced by gravity?
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Graduate Momentum calculation of a rotating rod
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High School Light Speed: Questions from a Layman
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Graduate Constructing Bondi Coordinates on General Spacetimes
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High School Time Travel into the Future: What Would Be the Reason?
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High School Find a Virtual SR Globe App - SiennaTheGr8
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Undergrad How certain are we about black hole mass density?
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Undergrad Question about length contraction
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Undergrad Understanding Black Hole Entropy: Consistency Across Reference Frames
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Undergrad Why did Einstein considered it “evident”?
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Undergrad Does a Photon Carry Velocity of Its Source?
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Undergrad Symmetry Group Freedom: Choosing How Groups Act on Coordinates
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Undergrad Length Expansion Opposite Direction: SR Simultaneity Explained
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Graduate General Relativity Book Recommendations
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High School Gravity Power: What Gives It the Ability to Accelerate Objects?
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High School Do single moving charges create magnetic fields, why?
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High School Help with constant acceleration under special relativity
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Undergrad Relative Simultaneity: Free Resources to Help You Understand
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Undergrad Massless Electron Compton Scattering: Energy of Outgoing Photon
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Undergrad Which Calculation Is Correct for Meteor Evasion Time in Spacetime Physics?
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Undergrad Why do we need to modify GR with theories like F(R) ?
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High School Time & Limit Velocity (Speed of Light)
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Undergrad Inertial frame of freely falling body
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Undergrad Understanding the Speed of Light in Ether: A Historical Perspective
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High School Calculate Proper Time for Two Events in Special Relativity
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Undergrad Wave Cuadrivector: Proving Four-Vector Invariance of Light Velocity
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Undergrad Musings, seeking opinions about the nature of time
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Undergrad A question about Alice and Bob in SR
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Graduate Is a volume element in relativity represented by a vector?
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Graduate Electromagnetism for Media in Arbitrary Motion
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Undergrad Interstellar Travel vs Universe Expansion: Is Andromeda Reachable?
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Undergrad Audio question about black hole
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Undergrad How Does Gravity Specifically Influence Mass?
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High School Gravitational Event Horizon: Two Interpretations
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High School Calculating Lorentz Factor with V=0
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Undergrad Relativity of Simultaneity: Observers Perceiving 3 Events
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Graduate Causal Structure of Metric Prop.: Matrix Size Differs
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Undergrad Coordinate transformations in GR
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High School Is Time Experienced by Photons at the Speed of Light?
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Undergrad Relativistic harmonic oscillator
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Undergrad Understanding Lorentz Transform Outputs
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Undergrad Relativistic speed of a rocket with constant thrust
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Undergrad How Does Special Relativity Challenge Our Understanding of Absolute Time?
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Undergrad Why Does Energy Have Mass in Quantum Field Theory?
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Undergrad GPS relativity error - really?
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Graduate What is the Relativity of Wrong?
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High School Energy & Momentum of Spacetime w/o Mass
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Undergrad Cylindrical Microwave Cavity Resonator: Speed of Light Dependency?
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High School Deriving Lorentz Factor: An Analysis of Jimmy360's Method
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High School Using SR & Curved Coordinates for Time Calculation
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High School Can the Lorentz Factor Approach 0i as v Exceeds c for FTL Reference Frames?
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High School Difference Between Proper Time and Coordinate Time Explained
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Undergrad Gravity's Degrees of Freedom: Explored
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Graduate Unpacking Entropy Bounds and Their Violations
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High School Relativistic Kinetic Energy: Does Mass Change?
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Undergrad A question about invariant mass
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Graduate Graviton Model: Can We Describe It Mathematically?
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High School Can Tachyons Challenge Our Understanding of Physics?
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High School Proper Time Change: Helium 4 Superfluid Effects
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Graduate Derivation of Einstein Field Equations w/o Poisson or Least Action
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Graduate How to calculate the Riemann curvature at r=2GM?
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High School Does a Black Hole with Lower Density Than Water Float or Sink?
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High School Second Postulate of Special Relativity Explained
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High School MinutePhysics Special Relativity Series
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High School New Paradox: Gamma Light & Relativistic Doppler Effect
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Undergrad Traveling at Light Speed: Is a Photon Stationary?
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Undergrad Simultaneity and the Twin Paradox
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Graduate Reporting my own post to bring this to the attention of a moderator.
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Graduate Explore Potential Energy, Pressure & Newtonian Gravity
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High School Is Lorentz Contraction Bona Fide or Just A "Perspective"?
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High School Simulation of a neutron star's impact on a supermassive black hole?
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High School What are the implications of a 24-light-hour tower at the Earth's equator?
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Undergrad Alcubierre Metric: Explaining Dark Matter Halo Speed
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Undergrad EoM via varying action - covariant derivative when integrate
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Undergrad Relative Simultaneity: Flashlight in Moving Ship
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Graduate Topology of Black Holes: Decomposing the Manifold and the Role of Knots
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Graduate Problem with a basic theorem in Wald's GR book
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High School Is There a Formula for Gm/r in Gravitational Potential?
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High School Ideas for Teaching Relativity to High School Kids
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Undergrad Metric Compatibility: Is It Forbidden?
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Undergrad Can Gravitational Waves Explain Uniform Space Expansion in the Universe?
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Undergrad Satellite Orbit synchronization
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Undergrad Is E=mc^2 Explained Correctly?
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Undergrad Effect of Relativity on Laser Sail Acceleration
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High School Mass-Energy Equivalence: Matter as Potential Energy?
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Graduate Calculating Christoffel Symbol with Rotating Metric
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