Alfred Cornu

Alfred Cornu
Born
Marie Alfred Cornu

(1841-03-06)6 March 1841
Orléans, France
Died12 April 1902(1902-04-12) (aged 61)
Alma materÉcole polytechnique
Éccole de mines
Known forCornu depolarizer
Cornu spiral
Cornu's refinement of the Fizeau experiment
RelativesMarie Maxime Cornu (brother)
AwardsRede Lecture (1899)
ForMemRS (1884)
Rumford Medal (1878)
Scientific career
FieldsPhysics
InstitutionsÉcole polytechnique
ThesisRecherches sur la réflexion cristalline (1867)
Notable studentsAlbert A. Michelson

Marie Alfred Cornu (French: [kɔʁny]; 6 March 1841 – 12 April 1902) was a French physicist and professor of École polytechnique. The Cornu spiral, a graphical device for the computation of light intensities in Augustin-Jean Fresnel's model of near-field diffraction, is named after him. The spiral (or clothoid) is also used in geometric design of roads. The Cornu depolarizer is also named after him.