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.
Insights Learning Twin Paradox for Freely-Falling Observers
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I A question about time dilation
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I Relativistic Effect of Time Dilation: What is it Called?
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B Time Dilation: Direction of Motion's Effect
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I Inquiry about a derivation in "A First Course in GR" by Schutz
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I Congruence vs Family of Worldlines: Taking Notes
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I Spacetime distance between spacelike related events
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B Space & Time: How Are They Related?
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I Lorentz Factor Variant: Derivation & Angle Dependence
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I Compatibility of Determinism & CTC in General Relativity
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B Photon Speed: Does it Need a Reference?
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I Equivalence principle: an electric charge and a coil
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I Twin Paradox Freely Falling Observers
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I Lorentz transformation for derivatives
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I Explore How Dropping Objects Into a Black Hole Changes It
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B Can You Experience Time and Decay While Falling Into a Black Hole?
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B Special Relativity for Beginners: Clock Comparison
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B Particle Disintegration and Momentum Conservation in Relativity
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I "Time is an illusion" according to Einstein
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B How Do Physicists Explain Black Hole Formation and Electromagnetic Repulsion?
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A Index-Free Expressions & Unique Metric-Compatible Connections
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B What Happens to Time on a Clock at r=r_{s}/2 Inside a Schwarzschild Black Hole?
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I The Twin Paradox implies that the Universe as a whole is a special frame
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I Orbits of Photons Around a Massball: Explained
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I Deriving Lorentz Transformations Using Calculus
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I Apparent Violations of Principle of Relativity?
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I A version of the twin paradox without accelerations
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I Proving Antisymmetry of Electromagnetic Field Tensor with 4-Force
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I Does General Relativity explain inertia?
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I Twin Paradox: Who Is Right, A or B?
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B Detecting Gravitational Waves: Earth-Like Planet Possibility
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B How to select the smooth atlas to use for spacetime?
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I Thought Experiment Proving Newtonian Momentum Not Conserved
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I Spherically Symmetric Metric: Is Singularity Free?
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I Do moving massive objects drag curved spacetime with them?
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I Mass of the Moon and Gravitational Lensing
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I Gravitational Redshift: Units, Velocity & Ratio Explained
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I Calculating Surface Area of Schwarzschild Black Hole w/Weyl Coordinates
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I Size Limit of Accelerated Rigid Body in Irrotational Born Rigid Motion
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B Why is the speed of light a constant?
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I The Physicist & Philosopher: Einstein vs. Bergson Debate
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B General Relativity, Twins & Schopenhauer: Analyzing Timing Diff.
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I Help Solve Twin Paradox Calc: A & B 1 Lyr Apart
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B Potential Energy formula in Special Relativty
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A Nonlocality Theorems & Relativity Principles
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B Space is Relative: A 17 Yr Old's Exploration
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I Why Geodetic Equation Doesn't Accept Schwarzschild Solutions
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I Twin Paradox Explained: No Math Required
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B Does Removing Planets Affect the Sun's Energy?
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B Time, Space, Fields, Spacetime & General Relativity
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I About inertial reference frames and logical deduction
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B Gravity: How Does It Work & What Causes It?
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I Gravity: A Fun Look - Any Bloopers?
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I Can We Explain the Cosmological Constant as a Tensorial Concept?
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I Lorentz Transform Deduction: Question Explained
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I Why does time dilation only affect one of the twins?
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A Help on some equations in Einstein's original papers
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A Another action for the relativistic particle
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A What Are Null Basis Vectors and Metric Signatures in Kruskal Coordinates?
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B Why the stay-at-home twin is not considered to be accelerating?
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I What does comoving mean and how is it related to isotropy?
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I Derive Lorentz Transformation by Visualizing Space-Time Coordinates
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B Gravitational Field Representation: Why 1-Plane?
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I GR for a mathematician and a physicist? What's the difference?
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I Does de Sitter Spacetime Have Flat Foliation?
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I Einstein vs Newton: The concept of inertial vs non inertial frames
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A Thought Exp: Transform Laws & Feedback Needed
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B Black Holes & Light: Questions from an Average Joe
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I Create Black Holes with Warping EM Fields: Feasible?
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I Detonator Paradox" Re-Cast: Can a Thin Wire Prevent a Bomb?
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B General Relativity & External Forces: 2 Cases Examined
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I Solve Constant Acceleration Problem in Special Relativity
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B Is the Doppler Effect Formula Different for Sources in Different Regions?
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I How Do Jacobi Fields Explain Tidal Forces in General Relativity?
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I Argument for Existence of Normal Coordinates at a Point
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B Leave the science to Scientists. Just tell me what is SR.
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I Is a Merry Go Round Floating in Space an Inertial Frame of Reference?
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I Mass Unit in General Relativity
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B Time dilation and the reference frame of the vacuum
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A Curved spaces that locally aren't flat
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I Dark energy questioning Relativity?
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I Metric Tensor: Symmetry & Other Constraints
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B Topology on flat space when a manifold is locally homeomorphic to it
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I Effective Potential & Curved Spacetime: Angular Momentum Effects
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A How to Read Geodesic Equation: Vector, 3-D & EFE Solutions
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B Can an Object Exceed the Speed of Light?
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B Symmetry in Higher Dimensions: Sean Carroll's Video & Physics
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B Does time dilation work in 1d space?
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I Questions about spaghettification and gas cloud G2
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B How Does Gravity Affect Spring Stretching in Einstein's Theory?
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A Gravitational Energy: Field x Moment
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I What is the nature of space and time in deep empty regions of the cosmos?
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B Time Dilation b/w Galaxies: Dark Matter Impact?
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I Computing Riemann Tensor: 18 Predicted Non-Trivial Terms
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A Double Dual of Vector Space: Is V** Always Same as V?
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B Difference Between Redshifts of Massive Galaxies & Accelerating Galaxies
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I Length Contraction: Traveling in a Space Ship
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B Components of Tangent Space Vector on Parametrized Curve
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B Time traveling in the future and in the past
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B On the level of detail required for GR math
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