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 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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Graduate Can Closed Timelike Curves Enable Real Time Travel?
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Graduate Gravitational Path of an Object
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Graduate Can photons create their own gravity?
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Undergrad Speed of Light Always The Same?
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Undergrad A BRIEF HISTORY OF TIME, question
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Graduate Understanding Causal Set Theory and Its Implications for the Universe
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Graduate Special relativity and Earth in context to a stationary point
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Graduate Our light cone was a black hole
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Graduate Twin Paradox- a quick(ish) question
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Graduate Zero connection => Zero torsion tensor ?
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Graduate Calculating Time Elapsed in Circling Spaceship
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Graduate Gravitational redshift and black holes
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Graduate Are black holes bosons or fermions?
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Graduate Does a black hole have shape?
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Graduate Red shift occurs when gravity is at 90*
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Graduate Can we predict which reference frame is correct?
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Graduate 1st Law of Black Hole Mechanics
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High School Nasa speaks of the either the space shuttle or the ISS
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Graduate What Causes the Shapiro Time Delay in Radar Signals?
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Graduate Gravity question: Why do things fall?
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Graduate Is the 4-velocity always a space-tipe 4-vector?
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Undergrad Acceleration and twin paradox question
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Graduate Thought experiment in relativity of simultaneity
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Graduate Getting stuff out of a black hole using a second one
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Graduate High relativistic speed + entanglement
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Undergrad Beginner needs answers to basic questions about the speed of light
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Graduate Conceptual Question about the Change in Mass
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High School What Causes Gravity and Can Anyone Explain It to Me?
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Graduate Summation convention and index placement
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Graduate Connection between fabric of space, max. speed (of light) and time dilation
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Graduate The Present Moment in Spacetime?
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Graduate Where is a light year inside the earth?
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Graduate Photons, gravity, and the bending of light.
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Graduate Superman's Exercise: Lifting & Twirling a Rod 100K km Long
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Graduate Time Dilation and Gravity's Effect on Light
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Graduate Relativistic Energy of Antimatter
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Graduate What Is Time: Answers to Your Questions
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Graduate Adding momentum in STR and DSR?
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Graduate Time dilation and gravitational constant
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Graduate Can Special Relativity Theory Explain All Electromagnetic Phenomena?
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Graduate Modeling Path of Object in General Relativistic/Riemannian Geom
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Graduate Gravitation/general relativity (minus math)
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Graduate Bending of Space: What, Why, Where, When?
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Graduate Cosmological Constant and the Colapse of the Universe
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Graduate Centripetal thrust need at high-speed
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Graduate Is the Duel on the Moving Train Fair in Relativistic Terms?
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Undergrad Gravity: Attractive or Repulsive Force?
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Undergrad Coriolis effect and relativity
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Graduate So what's next for Einstein's Relativity?
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Graduate Philosophic comments on time in Relativity.
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