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 Oppenheimer Snyder Collapse - finite time?
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Graduate Can you measure the proper length of a rope when dangling it into a black hole?
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Undergrad Black hole matter accumulation
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Graduate Divergence of Energy-momentum Tensor
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Graduate How Does Time Dilation Affect Subjective Travel Times in Space?
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Graduate Understanding Spinning Black Holes: A Confused Perspective
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Graduate Vacuum and non-vacuum regions, dust and fluids
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Graduate Combining General Relativity and Geodesy: A Master's Project Topic Suggestion
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Undergrad Earth's orbit and relative speed/time
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Graduate A thought experiment with theory of relativity.
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Graduate Momentum at the speed of light
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Undergrad Need quick answer on spatial dimensions
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Graduate How do I use Einstein's field equations to solve for particle locations?
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Graduate Red/blue shift in classic train/platfom thought experiment?
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Graduate Is Magnetism Affecting Our Clocks in Space?
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Undergrad The relationship between light, energy and relativity
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Graduate How Does Mass and Energy Affect Space-Time in Relativity?
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Graduate Special Relativity and the existence paradox
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Graduate How does gravitational acceleration change near an event horizon?
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Time: A Scientific Exploration
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Graduate Absolute Space and Moving Co-ordinates.
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High School Comparative speed of moving vs unmoving
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Graduate Spherical Mass Shell - What Actually Happens?
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Graduate Simultaneity is directional while time dilation is not?
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Graduate Spacetime expanding within galaxies?
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High School Whether the speed of alternative/direct current is faster than light?
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Graduate What is the issue with photon rest mass?
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Graduate Why does time depend on light?
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Graduate The Meaning of Natural Units: $c=1$
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Undergrad Someone moving near c to an observer?
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Graduate Schwarzschild Metric - Rindler coordinates
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Graduate Time dilation in a non-inertial reference frame
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Graduate Is there a smallest unit of gravity?
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Graduate Special Relativity breaks down in matter?
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Graduate Basic derivation of Lorentz Transformation
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Graduate Redshift of Sound in a Gravitational Field
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Graduate Transformation of the Line-Element
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Graduate Diffeomorphisms in Flat-Space: Are All Metric Preserving?
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Graduate Confused About Tensor Density Behaviour
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Graduate Conservation of Four-Momentum in Neutrino-Electron Collision
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Graduate Did I understand this correctly - time slowes down due to acceleration?
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Graduate Special Relativity basic concepts confusion
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Undergrad Two lightnings that happen at the same time, a train and a passanger
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Graduate Relativity and elementary physics
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Graduate Conservation of Momentum puzzle
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Graduate Effects of Constant Curvature on Radiation: Red-Shift or Unaffected?
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Graduate General Relativity Gravitation Calculations
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Graduate Understanding Aging and Time Dilation: The Twin Paradox Explained
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Graduate Why does length contraction happen only in the direction of motion?
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Graduate Does an accelerated particle emit gravitational waves?
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Graduate Does it mean that as you increase the energy of a particle
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Graduate What are the effects of Gravitomagnetism?
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Graduate Is General Relativity a Gauge Theory?
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Undergrad Simple realtivity: Length contraction
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Graduate Hi This is the definition of simultaneity I was taught: Two
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Graduate Relative motion - disagreement at very low speeds
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Graduate Is Gravity Fictitious? A Look at Victor Stenger's The Fallacy of Fine Tuning
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Undergrad 2 objects travailing in opposite directions?
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Graduate Math Courses Relevant to General Relativity
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Graduate Massive Object's Relativistic Velocity: What Happens to Earth?
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Graduate Why do mass, time and length change at a rate determined by Gamma?
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Graduate Is Lorentz factor reality true according to the laws of physics?
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Graduate Is Gravity Affected by its Own Potential Energy?
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Graduate Is There a Limit to the Speed of Time?
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Graduate Covariant Derivative: Different for Vectors, Spinors & Matrices?
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Graduate How can I easily study the derivation of Kerr Metric?
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Graduate Background required for general relativity
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Graduate Value of a measuring rod in an expanding universe?
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Undergrad Is EVERYTHING affected by gravity?
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Graduate Confusion in Lorentz Boost Equations: Minus Sign Needed?
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Graduate What relativity really looks like
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Graduate Do Total Current and Total Charge form a Lorentz Covariant Vector.
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Graduate Why Did the Michelson-Morley Experiment Expect Different Measures on Earth?
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Graduate Is Gravity Really a Gauge Theory?
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Graduate Testing a Relativity Simulator
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Undergrad Does Earth's Rotation Affect Distance for Light to Travel? | Explained
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Undergrad Light Clock Example this is not HW
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High School How Can Laser Spot Move Faster Than Light?
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Graduate Theory of relativity challenged
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Undergrad Could Non-Linear Length Contraction Resolve Relativity Paradoxes?
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Graduate Explaining Rigid Body Movement with 15*3*10^8m Stick
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Graduate How did Einstein get to the fact that mass slows time?
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Undergrad What are the Requirements for Time to be Considered a Vector?
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Graduate In what way do we still not understand gravity?
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Graduate What faster than light have to do with cause and effect paradox ?
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Graduate Does Earth's Elliptical Orbit Affect Time Dilation Due to Gravity?
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Graduate Can an Infinitely Stiff Rod Defy the Speed of Light in Relativity?
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Graduate What Common Misconceptions Do People Have About Relativity?
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Graduate Time-Like Intervals: Can't Find an Inertial Frame for Events?
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Graduate Value of energy-momentum tensor in weak field approximations
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Undergrad Question on Michelson Morley experiment and length contraction
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Graduate Why do some think faster than c= time travel?
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Undergrad Question about the rotating disk
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Graduate How does Ricci curvature represent volume deficit ?
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Undergrad Is There a Scientific Consensus on the Connection Between Inertia and Gravity?
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Graduate Black Hole Light Pulses: The Fascinating Phenomenon Explained in Simple Terms
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Graduate Towards a Generic Integral for Tau in Schwarzschild Radial Motion
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Undergrad What is the energy of a photon in relation to E=MC^2?
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Undergrad Speed of light and time travel
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Undergrad Is Special theory of relativity only about speed of light?
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