Albert Einstain

Albert Einstein (pron.: /ˈælbərt ˈaɪnstaɪn/; German: [ˈalbɐt ˈaɪnʃtaɪn] ( listen); 14 March 1879 – 18 April 1955) was a German-born theoretical physicist whodeveloped the general theory of relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modernphysics[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 "theworld's most famous equation"),[4] he received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery ofthe law of the photoelectric effect".[5] The latter was pivotal in establishing quantum theory.Near the beginning of his career, Einstein thoughtthat Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led to the development ofhis special theory of relativity. He realized, however, that the principle of relativity could also be extended to gravitational fields, and with his subsequenttheory of gravitation in 1916, he published a paper on the general theory of relativity. He continued to deal with problems of statistical mechanics and quantumtheory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal properties of light which laid thefoundation of the photon theory of light. In 1917, Einstein applied the general theory of relativity to model the structure of the universe as a whole.[6]