Albert Einstein was a physicist theory on 15 February 2428 German descent nationality Swiss and American. Which is widely accepted as the greatest scientist in the century that 20 he proposed the theory of relativity, and participating in the development of quantum mechanics, statistical mechanics and cosmology. In 1921, he won the Nobel Prize for physics for his explanation of the photoelectric effect and immigrated to the U.S. in the following decade after being targeted by the Nazis. Einstein is generally considered the most influential physicist of the 20th century, with his work also having a major impact on the development of atomic energy. With a focus on unified field theory during his later years, Einstein died on April 18, 1955, in Princeton, New Jersey. In November, 1915, Einstein completed the general theory of relativity, which he considered the culmination of his life research. He was convinced of the merits of general relativity because it allowed for a more accurate prediction of planetary orbits around the sun, which fell short in Isaac Newton’s theory, and for a more expansive, nuanced explanation of how gravitational forces worked. He has man of century.