Marie Cornu (other)
Marie Cornu may refer to: * Marie Alfred Cornu (1841–1902), French physicist * Marie Maxime Cornu Marie Maxime Cornu (July 16, 1843, in Orléans – April 3, 1901 in Paris) was a French botanist and mycologist. He was a younger brother of physicist Alfred Cornu (1841–1902). He studied at the École normale supérieure, and in 1872 received ...

Marie Alfred Cornu
Marie Alfred Cornu (; 6 March 1841 – 12 April 1902) was a French physicist and professor of École polytechnique. The French generally refer to him as Alfred Cornu. The Cornu spiral, a graphical device for the computation of light intensities in 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. Life Cornu was born at Orléans to François Cornu and Sophie Poinsellier. He was educated at the École polytechnique and the École des mines. Upon the death of Émile Verdet in 1866, Cornu became, in 1867, Verdet's successor as professor of experimental physics at the École polytechnique, where he remained throughout his life. Although he made various excursions into other branches of physical science, undertaking, for example, with Jean-Baptistin Baille about 1870 a repetition of Cavendish's experiment for determining the gravitational constant ...
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