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Albert Einstein (* March 14, 1879 in Ulm, † April 18, 1955 in Princeton, USA) was an American physicist of Swiss German-Jewish descent, whose contributions to theoretical physics significantly altered the physical world.

Einstein's major work is the theory of relativity, the understanding of space and time revolutionized. In 1905 appeared his work, entitled On the Electrodynamics of Moving Bodies, whose content today as a special theory of relativity is designated. 1916 Einstein published the general theory of relativity. Even quantum physics has made important contributions: for his explanation of the photoelectric effect, which he also had published in 1905, he was in November 1922 of the Nobel Prize in Physics for 1921 awarded. His theoretical work played - in contrast to popular opinion - in the construction of the atomic bomb and the development of nuclear energy only an indirect role.