1915-1950+A+LIGHT

World War One: 1914-1918 The Great Depression 1929-1939 *ended by World War Two World War Two: 1939-1945

Niels Bohr

1885-1962

Danish

Werner Heisenberg

1901-1976

German

James Chadwick

1891-1974

English

Erwin Schrödinger

1877-1961

Austrian