Astronomy Cast Ep. 368: Searching for the Aether Wind: the Michelson–Morley Experiment
Waves move through a medium, like water or air. So it seemed logical to search for a medium that light waves move through. The Michelson-Morley Experiment attempted to search for this medium, known as the “luminiferous aether”. The experiment gave a negative result, and helped set the stage for the theory of General Relativity.
Read the rest of Astronomy Cast Ep. 368: Searching for the Aether Wind: the Michelson–Morley Experiment (46 words)