Jean Baptiste Perrin
Facts
Photo: Henri Martinie. Nobel Foundation archive
Jean Baptiste Perrin
Nobel Prize in Physics 1926
Born: 30 September 1870, Lille, France
Died: 17 April 1942, New York, NY, USA
Affiliation at the time of the award: Sorbonne University, Paris, France
Prize motivation: “for his work on the discontinuous structure of matter, and especially for his discovery of sedimentation equilibrium”
Prize share: 1/1
Work
During the 1880s atoms and molecules became important scientific concepts, but whether or not they actually had a physical existence was still a matter of dispute. Jean Perrin maintained that if molecules were real, particles blended into a liquid should not all sink to the bottom but should distribute themselves throughout the liquid. In 1908 he could substantiate this through experimentation. He also substantiated Einstein’s theory that Brownian motion—the random movement of small particles in a liquid—was due to collisions between the particles and molecules in the liquid.
Nobel Prizes and laureates
Six prizes were awarded for achievements that have conferred the greatest benefit to humankind. The 12 laureates' work and discoveries range from proteins' structures and machine learning to fighting for a world free of nuclear weapons.
See them all presented here.
