Hippolyte Fizeau (1819–1896)
Born 1819 CE, died 1896 CE.
Armand Hippolyte Louis Fizeau (French: [ipɔlit fizo]; 23 September 1819 – 18 September 1896) was a French physicist who, in 1849, measured the speed of light to within 5% accuracy. In 1851, he measured the speed of light in moving water in an experiment known as the Fizeau experiment.
Text from the Wikipedia article Hippolyte_Fizeau, licensed CC BY-SA 4.0.