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 Can the Twin Paradox Be Proven?
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Undergrad Why Can't There Be Gravity in 2 Spatial Dimensions?
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Undergrad Cosmological Constant: Significance & "God" Particle
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Graduate A dark part of special relativity(at least for me)
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Graduate Spatial curvature in Schwarzschild & FRW
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Graduate Effect before Cause:absolute horizon
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Graduate SRT two observers will agree on their relative velocity
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High School Physics Q: Time If Everything Stops Except Clock?
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Graduate Vectors and the Speed of Light?
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Graduate Understanding Relativity: Explaining Inertial Mass and the Speed of Light
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Graduate What Defines Unstable Versus Unbound Orbits Around Black Holes?
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Graduate How Does Space Motion Affect Light Measurement Observations?
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Graduate A different take on the Schwarzschild Metric
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Graduate How does time dilation really work?
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Graduate An idea on explaining the weak equivalence principle
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Graduate Breaking Light and Einstein-Rosen Bridges?
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Graduate Are there other Lorentz invariant bilinear combinations of E and B?
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High School Ages of A & B: Unbelievable Difference?
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Graduate Understanding Length Contraction and Time Dilation
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Graduate Help with a really nerdy calculation?
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Graduate Photon/particle's energy in General Relativity
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Graduate Faster than the speed of light with only a fishing line
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Graduate Role of Exclusion principle in formation of black holes.
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Graduate Reduced density matrices and Lorentz transformation
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Graduate What is a Rank 3 Tensor and Why Does It Matter?
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Undergrad The beautiful sight of the interstellar traveller
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Graduate Does the presence of B change the velocity of C with respect to A?
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Graduate Is Proper Time Invariance Proven?
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Graduate Can't get time dilation to add up
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Graduate Is the behavior of light that remarkable?
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Graduate What are some potential topics for a FAQ on the Twin Paradox?
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Graduate What is time? Is it an imaginary thing?
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Graduate Einstein field equations (EFE's)
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Graduate Theories of relativity and the resulting E = MC^2
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Graduate Neutron Stars and Special Relativity
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Undergrad Traveling at Near-Light Speed: Time Dilation and Your Perspective Explained
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Graduate The Photon's Perspective Taboo
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Graduate Send Particle Backwards in Time - Is this a hoax?
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Graduate Relativistic Mass and Energy Convservation
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Graduate Do Gravity Waves and Light Waves Follow the Same Paths in Space-Time?
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Undergrad How Can a Simple Laser Pointer Cause Destruction at Light Speed?
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High School Tracing the Passage of Time: Is It Possible?
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Graduate Most basic of thought experiments in special relativity
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Graduate Large Scale Structure of Spacetime Study Group
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Graduate Solving Tricky Pauli Matrices with Einstein Notation
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Graduate Is Time Variable When Light is Constant?
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Graduate How does light slow in the presence of gravity?
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Undergrad Superman and Time Travel: Is It Possible?
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Undergrad Confused in a thought-experiment
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Undergrad Why do we need to see gravitation as force?
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Graduate Need help understanding an equation
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Graduate Can Time Exist Without Mass or Energy in Space?
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Graduate Question about SR and increasing mass
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High School So, sorry for asking a stupid question.What causes Time to Move?
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Graduate Are proper travel distances contracted by SR?
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Graduate Kinetic Energy & Relativity: E=mc^2
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High School Mass + potential kinetic energy
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High School Teaching 7th Graders About Black Holes
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Graduate Spacetime Translational Invariance vs(?) Lorentz Covariance
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Undergrad Doppler Effect on Light: Understanding Red and Blue Shifts in Galaxies
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Graduate Feynman's perihelion of mercury calculation using field theory
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Graduate Hawking radiation: why only one way?
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Graduate How Do You Calculate a 2D Null Geodesic in the Presence of a Gravitational Mass?
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Undergrad Weightless in a Shielded Room: Does Gravity Still Apply?
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Graduate Close to light speed visualization question
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Graduate What Distinguishes a Free-Falling Frame from a Fermi-Walker Frame?
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History of Gravity: A Brief Overview from Antiquity to 20th Century
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Graduate Interpretation of spacetime diagrams.
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Graduate How fast to go 1000 years into the future
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Undergrad Beginner's question on bending of space time and measuring distance to stars
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Graduate DeBroglie and Time Dilation Paradox
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Graduate Axxis Movement: Lorentz Transformation
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Graduate Questions on Gravity: Wavelength, Frequency, Effects
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Graduate Does spacetime curvature of EM field affect zero-charge particles?
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Undergrad Can Time Travel Create Paradoxes?
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Graduate Gravitational waves adn Black holes frequency
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Graduate Who Truly Experiences Slower Time in the Paradox of Time Dilation?
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Undergrad What is the Relationship Between Speed of Light and Time?
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Graduate Quantum Gravity: Reconciling General Relativity & QFT
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Undergrad I was wondering why Einstein picked C for this equation.
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Graduate Relativity of distances/lengths
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Graduate What is the difference between proper time and coordinate time in relativity?
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Graduate Using a computer to calculate Einstein tensor etc.
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Graduate Solving Matrix Equations in SL(2,C) for Arbitrary Vectors
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Graduate Understanding de Sitter Space: FRW or Hyperboloid?
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Undergrad How do you prove that the speed of light is absolute
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Graduate Is there a Space-Time Curvature equation?
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Graduate Pauli-Fiertz Lagrangian: Book Recommendation
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Graduate Are Einstein's and Newton's Laws of Physics in Conflict?
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High School How Can We Reach the Speed of Light?
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Graduate Leonard Susskind: General Relativity
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Graduate Gradients in the curvature of space-time
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Graduate What is the correct definition of energy in relativistic systems?
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Graduate Coupled nonlinear partial differential equations or simple matrices?
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Undergrad Gravity Waves: Speed & Possible Outcomes
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Undergrad Is It Possible to Reach the Speed of Light with a Spacecraft?
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Graduate Polarization Vectors: Momentum & Helicity Explained
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Graduate What would it actually look like?
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Graduate Will our sun become black hole if it were moving fast enough?
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Graduate Alternative way of looking at simultaneity is 1
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