Paul Langevin

Paul Langevin
Born	(1872-01-23)23 January 1872 Paris, France
Died	19 December 1946(1946-12-19) (aged 74) Paris, France
Alma mater	University of Cambridge Collège de France University of Paris (Sorbonne) ESPCI
Known for	Langevin equation Heisenberg–Langevin equations Langevin dynamics Langevin function Twin paradox
Awards	Hughes Medal (1915) Copley Medal (1940) Fellow of the Royal Society[1]
Scientific career
Fields	Physics
Institutions	ESPCI École Normale Supérieure
Thesis	Research on ionized gases  (1902)
Doctoral advisors	Pierre Curie Joseph John Thomson Gabriel Lippmann
Doctoral students	Louis de Broglie Léon Brillouin
Signature

Paul Langevin^[1] (/lænʒˈveɪn/;^[2] French: [pɔl lɑ̃ʒvɛ̃]; 23 January 1872 – 19 December 1946) was a French physicist who developed Langevin dynamics and the Langevin equation. He was one of the founders of the Comité de vigilance des intellectuels antifascistes, an anti-fascist organization created after the 6 February 1934 far right riots. Being a public opponent of fascism in the 1930s resulted in his arrest and being held under house arrest by the Vichy government for most of World War II. Langevin was also president of the Human Rights League (LDH) from 1944 to 1946, having recently joined the French Communist Party.

He was a doctoral student of Pierre Curie and later a lover of widowed Marie Curie. He is also known for his two US patents with Constantin Chilowsky in 1916 and 1917 involving ultrasonic submarine detection.^[3] He is entombed at the Panthéon.