Einstein, Albert

Einstein, Albert (b. Ulm am Donau, Germany, 14 March 1879; d. Princeton, N.J., 18 April 1955) Shortly after earning a Ph.D. from the University of Zurich (1905), Einstein propounded the theory of relativity and the equation E = mc2. In 1921 he won the Nobel prize for research on the photoelectric effect of light. After most of his important work was done, he emigrated from a university post at Berlin in 1932 and joined the Princeton faculty. On 2 August 1939, he strongly urged Franklin D. Roosevelt that the US develop an atomic bomb, in a critical letter that marked the first step in the Manhattan Project.