Furthermore, eight " normaliens " have gone on to receive the Nobel Prize in Physics : Claude Cohen-Tannoudji, Pierre-Gilles de Gennes, Albert Fert, Alfred Kastler, Gabriel Lippmann, Louis N�el, Jean-Baptiste Perrin and Serge Haroche, while other ENS physicists include such major figures as Paul Langevin, famous for developing Langevin dynamics and the Langevin equation.
