Hippolyte Fizeau

Hippolyte Fizeau
Hippolyte Fizeau in 1883 by Eugène Pirou.
Born23 September 1819
Died18 September 1896
(aged 76)
NationalityFrench
Known forFizeau experiment
Fizeau interferometer
Fizeau wheel
Fizeau's measurement of the speed of light in air
Doppler–Fizeau effect
Astronomical interferometry
Capacitor
Optical dilatometer
Redshift
AwardsRumford Medal (1866)
FRS (1875)
Scientific career
FieldsPhysics

Armand Hippolyte Louis Fizeau FRS FRSE MIF[clarification needed] (French pronunciation: [aʁmɑ̃ ipɔlit lwi 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.