The American Institute of Physics credits the photo [1] to AB Lagrelius & Westphal, which is the Swedish company used by the Nobel Foundation for most photos of its book series Les Prix Nobel. · Public domain

Worked out the quantum structure of the atom and, through the institute he built in Copenhagen, taught most of the generation that finished the job. Son of a Jewish mother, he spent the 1930s finding posts and escape routes for scientists fleeing Germany, then fled himself by fishing boat in 1943. Nobel Prize in Physics, 1922.