#foucault's_measurements_of_the_speed_of_light
Foucault's measurements of the speed of light
Scientific instrument used to measure the speed of light
In 1850, Léon Foucault used a rotating mirror to perform a differential measurement of the speed of light in water versus its speed in air. In 1862, he used a similar apparatus to measure the speed of light in the air.
Tue 29th
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