Back ফিজো-ফুকো যন্ত্র Bengali/Bangla Zahnradmethode German Experimento de Fizeau y Foucault Spanish Fizeaun–Foucault’n koe Finnish Appareil de Fizeau French מנגנון פיזו-פוקו HE Fizeau-módszer Hungarian Apparato di Fizeau-Foucault Italian 피조의 광속 측정 Korean Roda de Fizeau Portuguese
In 1848−49, Hippolyte Fizeau used a toothed wheel apparatus to perform an absolute measurement of the speed of light in air.
Subsequent experiments performed by Marie Alfred Cornu in 1872–76 improved the methodology and made a more accurate measurement.