A H L Fizeau was a French physicist. He was born in 1819 at Paris and died in 1896. In 1847, working with Jean Foucault, he showed that infraredradiation has the same properties as visible light, that is it is reflected, refracted and is capable of forming interference patterns. Then in 1849 he measured the speed of light using a toothed wheel to interrupt the light. Research A. H. L. Fizeau
Jean Bernard Leon Foucault was a French physicist. He was born in 1819 and died in 1868. He invented a pendulum to demonstrate the rotation of the earth by the rotation of its plane of oscillation. He also rendered services to optics, electric lighting, photography, etc. Research Jean Foucault
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Abbreviations
Research A. H. L. Fizeau
