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 Equation of state in gravity vs microphysics
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Graduate Empirical meaning of relativity in the context of QM
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Graduate Comparing Newton & Einstein's Gravity: What Makes GR Better?
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Graduate Einstein-Hilbert term and mass, gravity
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Graduate Is the Graviton Necessary for Gravity in Light of Higgs Field Discoveries?
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Graduate Universal Central Observer: Doubling Speed of Light Separation
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Undergrad Hafele and Keating time dilation question
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Graduate How can the equation E^2=(mc^2)^2+(pc)^2 be proven?
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Graduate Physical explanation of velocity time dilation
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Graduate Could Quantum Geons Achieve Stability Like Bohr Atoms?
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Graduate Quantum wave equations in curved space
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Graduate Can we describe the physics of a photon in an inertial reference frame?
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Graduate Q: "Time Dilation: Faster = Longer Wait?
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Roy Kerr awarded Einstein Medal
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Undergrad Gravity and ideas of how we can effect it on earth
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Graduate Centrifugal Acceleration GR: Formula for .8c, 1m Radius
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Graduate Is time quantum at the microscopic level?
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Graduate Second order expansion of metric in free-fall
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Graduate Which direction does boosted spin point?
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Graduate Is dτ Invariant Under Transformations Beyond Lorentz in Special Relativity?
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Graduate How Does the Twin Paradox Change With Beacons?
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Undergrad Is Mass a Form of Energy According to E = mc²?
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Graduate A thought experiment on relativistic Electrostatics
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Graduate Overlapping observable universes
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Graduate Surface gravity calculation, where am I wrong?
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Graduate Angled light path in moving clock
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Graduate Acceleration in SR makes it equivalent to GR?
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Graduate Lenght Contractions in Inertial Reference Frames
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Graduate Has relativity been proved wrong?
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Graduate Prove Maxwell Eqs. Covariant: Wave Eqn & 4th-Vector Pot.
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Graduate Coordinate Tetrads: Other than Cartesian?
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Graduate Can inertial reference frame have different sizes at least in theory?
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Graduate Time dilation in relativity of simultaneity related to twin paradox
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Graduate Gravity vs. infinitely rigid bar
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High School High Velocities Through Portals: Escape Velocity Achieved
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Undergrad Time of acceleration dissipation
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Undergrad Doubt in the calculation of the age of the universe?
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Graduate The first postulate of relativity
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Graduate Synchronized Clocks in Frames boosted by Acceleration
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Graduate When accelerating at high %c, can apparent velocites exceed c?
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Graduate Understanding General Covariance & Relativity Principle
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Graduate Mathematically precise formulation of Ehlers-Geren-Sachs theorem
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High School Wavelength Speed: 10nm vs 1mm - Does UV Travel Faster?
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Graduate Can Light Be the Perfect Reference Frame to Solve Problems of Reference Frames?
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Graduate Can Tachyons Enable Messages to the Past?
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Graduate Is a black hole's mass zero according to a distant observer?
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Graduate Deriving the Metric from the Energy-Momentum Tensor
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Graduate How can doppler effect occur when c is indepedent of motion?
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Undergrad How to explain Einstein's Special theory of Relativity.
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Graduate Why Is Thomas Precession Critical in General Relativity Calculations?
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Graduate Speed of light, and path of travel, in distorted time-space
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Undergrad Can a nuclear bomb detonated from orbit actually destroy the Earth?
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Graduate Time Dilation: Object slowing down vs Subject speeding up
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Graduate Is the higgs field required to have space-time warping?
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Graduate Understanding the speed of light between 2 ships racing away from each other
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Graduate Alcubierre metric and gravitational waves
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Graduate Understanding Tensors & General Relativity
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Graduate Do photons obey the 1/r^2 gravity law?
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Graduate Notions of simultaneity in strongly curved spacetime
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Graduate Two spaceships in opposite direction at near c
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Graduate Does Hawking Radiation preclude EH formation?
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Graduate Length Contraction vs. Distance Contraction
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Graduate Perceiving near c speeds from a great distance
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Graduate Curvature of Spacetime related to mass and expansion
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Graduate Why the square-root of the metric
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Graduate The relationship between Stress-Energy tensor and Mass
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Graduate The Invariance Principle: Understanding the Essence of Special Relativity
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Graduate Deriving a Minkowski Force Matrix: Exploring 4-force
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Graduate Is Your Thought Experiment on General Relativity Foundations Valid?
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Graduate What is the current physics consensus on block time and the block universe?
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Graduate Flat vs. Conformally Flat Spacetime
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Graduate Why is the linearized vierbein a 2nd rank tensor in flat spacetime?
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Graduate Solving the Critical Radius for Relativity: Find krE!
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Graduate Does observer's sense of gravity change?
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Graduate What's the difference between apparent horizon and event horizon?
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Undergrad What happens during acceleration in twin paradox?
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Graduate Understanding Tensor Bases: Solving Equations in General Relativity
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Graduate How does time expansion/contraction work for opposite moving observers?
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Graduate Derivation of lorentz transformation?
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Graduate How Does Time Dilation Affect Perception in Space Travel?
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Graduate Are Finkelstein/Kruskal Black Hole Solutions Compatible with Einstein's GR?
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Graduate What Are the Implications of Nikodem Poplawski's ECSK Gravity Theory?
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Graduate Some doubts concerning the mathematical bases of GR
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Graduate Unfortunate Doppler Discussion in Nice Paper
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Graduate Why is there no factor of 4 in the variation of Riemann squared action?
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Graduate Is relative mass making gravitational field?
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Graduate Lorentz transformation of y cpmponent for 4-momentum
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Undergrad Mass causes space time curvature
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Graduate Space-time can mean without mater or energy ?
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Graduate Different speed of light at different milky way radius?
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Graduate Solve relativistic velocity in terms of momentum (vector equation)
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Graduate FRW Model Q: Why Does Positive (ρ+3p) Prove Big Bang?
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Graduate Motivation behind vacuum Einstein equation
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Graduate Does Accelerated Electron Emit Gravitational Radiation?
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Graduate The light clock and the simple clock
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Graduate Closed Dimensions: Metric Tensor, Curvature & Time
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Graduate Mass of a Boxful of Extremely Intense Radiation
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Graduate Rotation and Revolution in relativity
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Graduate Does rotation of a 3d volume about a 2d plane create gravity?
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Graduate Evaluating time for falling body to reach event horizon
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