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 Explaining Different Types of Time in Relativity
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Undergrad Christoffel Symbol vs. Vector Potential
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Undergrad What does it take to spaghettify?
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Undergrad Is the Age of Our Universe Affected by the Speed of Time at the Big Bang?
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Undergrad Why not find mass increase in a simple way?
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Undergrad Help Deriving Relativistic Momentum Equation 3.9
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Undergrad Solving Length Contraction Paradox
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Undergrad Null geodesics in Schwarzschild spacetime
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Undergrad Einstein's Equivalence Principle.
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Undergrad Misner Solution Line Element | Einstein Field Equations
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Undergrad Relativity of simultaneity -- an example in D.Morin's book
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Undergrad Velocity Addition Example: Morin's Confusing Use of Equation
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Undergrad Gravitational Redshift: Derivation from Static Metric
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Undergrad Is a 2-body elliptical orbit stable in GR?
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Undergrad Collision in special relativity
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Undergrad Understanding the Einstein Train Thought Experiment: Scenario Comparisons
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Undergrad Two metric tensors describing same geometry
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Undergrad Deriving distances from reference frames
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Undergrad Is mass conserved in relativistic collision?
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Undergrad Why was time dilation under GR a new concept?
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Undergrad Special relativity and inertial frames
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Undergrad A good reference sheet/manual about Einstein index notation?
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Undergrad Mass in Special Relativity: Misconception or Reality?
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Undergrad Deriving the FLRW Metric: 4D Euclidean Space Needed?
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Undergrad Mercury Precession and the Hypothetical Oblate Sun Model
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Undergrad Coordinate vs. Non-Coordinate Basis in General Relativity
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Undergrad Unifying gravity and quantum mechanics
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Undergrad Is the Contraction of a Mixed Tensor Always Symmetric?
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Undergrad What happens when two light beams approach each other.
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Undergrad Velocity 4-Vector for Light Ray
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Undergrad Understand Shape of Universe: Spatially Flat?
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Undergrad The Curious Case of White Holes: Unraveling the Mysteries of Spacetime Curvature
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Undergrad Something I noticed about Doppler asymmetry
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Undergrad Maxwell's Eqs. & Tensor Notation
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Undergrad Quantizing Fluid Mechanics & Gravity: A Debate
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Undergrad What is the mass of a black hole made of?
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Undergrad General Relativity: Is There No Universal Frame or No Way to Tell?
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Undergrad Metric Components: Inner Product of Vector U & V
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Undergrad Speed of Light from Car Headlights & Brake Lights
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Undergrad Time: Questions for Curious Minds
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Undergrad Understanding Wormhole Solutions to the Einstein Field Equations
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Undergrad Rotating Black Holes: Q&A with First-Time Poster
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Undergrad Does Planck Time Imply an Acceleration Limit?
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Undergrad What Are the Intriguing Questions Surrounding Time Dilation?
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Undergrad Stretching a rubber band increase its mass but how?
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Undergrad Help with Newtonian Gravity as Limit of General Relativity
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Undergrad Magnetic Charges & Lorentz Invariance: Finding Papers
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Undergrad Help Understand Retarded Function: Einstein Eq. Linearized
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Undergrad Does global topology lead to a preferred frame in SR?
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Undergrad Writing Components of a Metric Tensor
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Undergrad Why do physicists show the magnetic field perpendicular to F
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Undergrad Rod falling through the event horizon of a black hole
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Undergrad Gravitational Waves & Energy: Is There a Consensus?
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Undergrad How can the Equivalence Principle hold when we consider tidal forces?
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Undergrad Complex Isomorphism Error in Lorentz Transform
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Undergrad Understanding Electromagnetism & General Relativity
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Undergrad Generalized Tetrad Formalism for Rotating Spacetimes and the Equatorial Plane
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Undergrad Why Are Equally Spaced Events Preserved in Transformation?
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Undergrad Help with Anti-Relativity activist
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Undergrad Michelson Morley Experiment Light Source
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Undergrad Why does time have to be a complex (Minkowski metric)?
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Undergrad Interaction Term in EM Lagrangian - Explained
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Undergrad Solve Electromagnetic Field Acting on Charged Particle
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Undergrad Stretched spring and change in mass
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Undergrad Compute Relativistic Velocities of Photons & Neutrinos
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Undergrad GR as a Graded Time Dilation Field in Euclidean Space?
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Undergrad Differential Forms in General Relativity: Definition & Use
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Undergrad Index Notation, Covector Transform Matrix Rep
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Undergrad GR: How Much Mechanics is Involved?
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Undergrad Theoretical problem with an empty seat going faster than light
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Undergrad Geodesics on S2 Surface: Arc-Length Parametrisation
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Undergrad Length contraction vs expansion
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Undergrad On the invariant speed of light being the upper speed limit
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Undergrad Geodesics and affine parameterisation
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Undergrad Gravitational Wave: Energy & Amplitude Changes
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Undergrad Differential Forms in GR: Higher Order Derivatives
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Undergrad Why is proper time undefined for spacelike/lightlike paths?
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Undergrad Why don't general relativity and quantum physics agree?
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Undergrad Relativistic Effect on Attraction between Moving Masses?
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Undergrad Can Time Be Frozen and Plotted in 3D Space?
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Undergrad Wave Equation & Wave Displacement Invariance: Modern Physics
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Undergrad Applicability of E and B field Transformations
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Undergrad What does Pt mean in this formula?
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Undergrad Discrepancy in Co-Moving Charges Magnetic Force?
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Undergrad SR Doppler Effect: Differences in Wave VS Momentum Models
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Undergrad By what formula is this graph predicted? Cumulative Periastron Time Shift
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Undergrad Proper Distance Between Surfaces of Constant R in Curved Spacetime
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Undergrad Understand Michelson-Morley Experiment from Feynman Lectures
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Undergrad Relativistic Explanation for the Unipolar Generator
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Undergrad Is Symmetry on μ and α Valid for the Derivative of the Metric Tensor?
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Undergrad Definition and measurement of proper length
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Undergrad Relativistic rocket - where is the relativistic mass?
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Undergrad Stress Energy Tensor for Oscillator: Setup for Electron in E-Field
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Undergrad Why y=y' in the Lorentz transformation?
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Undergrad Kinetic Energy & Speed in Inertial Frames: Chris, Bob & Angelica
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Undergrad Frequency of GW Arm Length Change: Properties & Detailed Explanation
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Undergrad Help with Derivation of Linearized Einstein Field Eqns
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Undergrad Special relativity timebomb on distant planet 'paradox'?
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Undergrad Differential Forms: Definition & Antisymmetric Tensor
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Undergrad How can gravitational waves be detected if spacetime itself warps?
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