Relativity And Spacetime 1-22
22 entries in the Relativity And Spacetime compendium.
Lorentz covarianceProperty of spacetime ensuring equations hold in all inertial frames.Lorentz factorDimensionless factor quantifying relativistic time dilation and length contraction.Lorenz gauge conditionA Lorentz-invariant gauge condition for electromagnetic potentials.Minkowski spacetimeFour-dimensional model unifying space and time in special relativity.Moving magnet and conductor problemA thought experiment on relativity and electromagnetism.No-hair theoremBlack holes are fully described by mass, charge, and spin.Penrose diagramA conformal diagram mapping causal structure of spacetime.Penrose–Hawking singularity theoremsTheorems proving gravitational singularities are inevitable under general relativity.Poincaré groupIsometry group of Minkowski spacetime, fundamental to special relativity.Principle of covariancePrinciple requiring covariant formulation of physical laws.Principle of localityAn object is influenced directly only by its immediate surroundings.Problem of timeA conflict between quantum mechanics and general relativity over time.Proper timeProper time is the time measured by a clock along its world line.Mass–energy equivalenceMass and energy are equivalent, related by the speed of light squared.Relativity of simultaneityDistant simultaneity depends on the observer's reference frame.Retarded timeEmission time accounting for light's finite speed.SpacetimeA four-dimensional continuum fusing space and time.Spacetime diagramGraphical tool illustrating spacetime geometry in special relativity.Tests of general relativityObservational evidence confirming Einstein's theory of general relativity.Twin paradoxA thought experiment on relativistic time dilation and aging.Time in physicsTime is defined by measurement and is a fundamental quantity in physics.Wheeler–Feynman absorber theoryTime-symmetric electrodynamics with no independent electromagnetic field.
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