Jean Cabannes (b Marseille August 12, 1885 – St. Cyr-sur-Mer October 31, 1959) was a French physicist specializing in optics .
From 1910 to 1914 Cabannes Worked in the laboratory of Charles Fabry in Marseille on the topic lancé by Lord Rayleigh at the end of the 19th century of how gas molecules diffused light . In 1914 he showed that pure gases could scatter light. Reviews This was published in Comptes Rendus in 1915. (Please see reference.) His career Was Then interrupted for five years by World War I .
In 1919 Cabannes returned to Fabry’s laboratory to complete his thesis, after which he moved to Montpellier , and later on to Paris . In 1925 he and Jean Dufay calculated the height of the ozone layer. J. Cabannes, P. Daure and Y. Rocard were among the scientists who, in 1928, discovered that light monochromatic diffusing gases could also change their wavelength (the Cabannes-Daure effect ).
This is independently by Raman CV and Krishnan KS in liquids, and by Landsberg GS and Mandelstam LI in Crystals. Cabannes was among the candidates for the Nobel Prize in Physics of 1929 (proposed by C. Fabry), which was awarded to de Broglie .
The 1930 prize went to Raman who gave the complete explanation of the effect , using quantum mechanics .
The lunar crater Cabannes was named after him.
In 1949 he was elected a member of the Academy of Sciences . In 1924 he received the Félix Robin Award and in 1951 the first ever awarded Prize of the Three Physicists from the Fondation de France .
Cabannes was the President of the French Astronomical Society (SAF) , from 1951-1953. 
He was married to a daughter of Eugène Fabry (1856-1944), brother of Charles Fabry, and was the father of four children, among whom was the mathematician Henri Cabannes.
- Jump up^ List of presidents of the Astronomical Society of France
- J. Cabannes, Comptes Rendus, vol. 160, pp. 62-63 (1915).