 Tests of special relativity

Special relativity connects measurable clock rates, length contraction, light propagation, and four-momentum through the Lorentz transformation. Tests probe particular predictions rather than measuring a coordinate transformation in isolation. Examples include cosmic-ray muon time-dilation experiments, muon storage-ring time-dilation experiments, the Michelson-Morley experiment, the Fizeau experiment, and particle-collision energy and momentum balances.

Tests of special relativity refer to experiments and observations designed to verify the predictions made by Albert Einstein's theory of special relativity, which was published in 1905. Special relativity fundamentally changed our understanding of space and time, introducing concepts such as the constancy of the speed of light, time dilation, length contraction, and the equivalence of mass and energy (E=mc²).