1902 – Born in Guebwiller on the 3rd of May.
1921 – He went to the Ecole Normale Supérieure in Paris.
1926 – He began teaching physics at the Lycée of Mulhouse, and then taught at the University of Bordeaux.
1941 – He was a university professor.
1952 – Georges Bruhat asked him to come back to the Ecole Normale Supérieure, where he finally obtained a chair.
1966 – He won the Nobel Prize in Physics "for the discovery and development of optical methods for studying Hertzian resonances in atoms".
– He was president of the board of the Institut d’optique théorique et appliquée.
1984 – Died on the 7th of January.