Marcel Brillouin

Louis Marcel Brillouin (French: [bʁilwɛ̃]; 19 December 1854 – 16 June 1948) was a French physicist and mathematician.

Born in Saint-Martin-lès-Melle,Deux-Sèvres, France, his father was a painter who moved to Paris when Marcel was a boy. There he attended the Lycée Condorcet. The Brillouin family returned to Saint-Martin-lès-Melle during the Franco-Prussian War of 1870 to escape the fighting. There he spent time teaching himself from his grandfather's philosophy books. After the war, he returned to Paris and entered the École Normale Supérieure in 1874 and graduated in 1878. He became a physics assistant to Eleuthere Mascart (his future father-in-law) at the Collège de France, while at the same time working for his doctorates in mathematics and physics, which he gained in 1880 and 1882, respectively. Brillouin then held successive posts as assistant professor of physics at universities in Nancy, Dijon and Toulouse before returning to the École Normale Supérieure in Paris in 1888. Later, he was Professor of Mathematical Physics at the Collège de France from 1900 to retirement in 1931.

In 1911 he was one of only six French physicists invited to the first Solvay Conference. He was awarded the Prix La Caze for 1912. Brillouin was elected to the Académie des Sciences in 1921. He was an officer of the Legion of Honour.

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