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Experimental proof of length elongation due to gravitational field?

general-relativity gravity spacetime

asked 3 mins ago user210956 207

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Active Diffeomorphism

general-relativity differential-geometry symmetry

answered 8 mins ago Bence Racskó 4,412

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How would General Relativity be different if we assumed Galilean instead of Lorentz transformations?

general-relativity differential-geometry inertial-frames curvature galilean-relativity

modified 4 hours ago Slereah 8,005

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Bending of light - photon's inertia instead of mass

general-relativity visible-light newtonian-gravity gravitational-lensing

modified 14 hours ago Qmechanic♦ 105k

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How does the Equivalence Principle imply that derivatives of the metric vanish in a freely falling frame?

general-relativity metric-tensor coordinate-systems inertial-frames equivalence-principle

modified 15 hours ago Alex 233

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Proper time and its definition

general-relativity metric-tensor conventions

modified 16 hours ago Qmechanic♦ 105k

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Turbulent spacetime from Einstein equation?

general-relativity gravity spacetime turbulence non-linear-systems

modified 18 hours ago Ken Abbott 105

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Commutation relations for inverse d'Alembertian operator

general-relativity tensor-calculus

modified 20 hours ago Community♦ 1

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Apple falls for which of these 2 reasons?

general-relativity gravity

modified 20 hours ago Umer 1

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Question about Ricci Rotation Coeficients

general-relativity differential-geometry tensor-calculus

modified yesterday M.N.Raia 466

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What is intuitively the Hodge dual of a $p$-form?

general-relativity differential-geometry duality

answered yesterday Ben Crowell 51.1k

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What is knotted in EM and GR?

general-relativity maxwell-equations topological-field-theory

asked yesterday S. McGrew 7,944

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Chart(s) of space-time as a smooth manifold

general-relativity spacetime differential-geometry coordinate-systems topology

modified 2 days ago Qmechanic♦ 105k

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How can classical black holes even exist?

general-relativity black-holes time-dilation

modified 2 days ago Edouard 87

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