====== Michelson-Morley Experiment ====== [{{ :experiments:michelesonmorley2.png |Source: [[http://research-repository.uwa.edu.au/en/publications/a-michelsonmorley-resonant-cavity-test-of-lorentz-invariance(473422ad-a24e-4def-90cc-490a7be78990).html|A Michelson-Morley resonant cavity test of Lorentz invariance]] by Stephen Parker}}] [{{ :experiments:michelesonmorley.png |Source: https://edoc.hu-berlin.de/handle/18452/16403}}] The motto in this section is: //the higher the level of abstraction, the better//. The Michelson-Morley experiment discovered that the speed of light is constant in all inertial frames of reference. This lead to the insight that Newtonian mechanics must be replaced with [[models:special_relativity|special relativity]].