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 Albert Einstein (pron.: /ˈælbərt ˈaɪnstaɪn/; German: [ˈalbɐt
ˈaɪnʃtaɪn] (
listen); 14 March 1879 – 18 April 1955) was a
German-born theoretical
physicist who developed the general theory of
relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern
physics[2][3] and the most influential physicist of
the 20th century. While best known for his mass–energy
equivalence formula E = mc2 (which has been dubbed "the world's most famous equation"),[4] he received the 1921 Nobel Prize in
Physics "for his services to theoretical physics, and especially
for his discovery of the law of the photoelectric
effect".[5] The latter was pivotal in
establishing quantum
theory.
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