Albert Einstein (March 14, 1879-April 18, 1955), a German-born theoretical physicist, who discovered the theory of relativity and gravitational theory, leading to a revolution in physics. For this achievement, Einstein often referred to as the father of modern physics. 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". He also developed the theory of photons of light and come up with explanations of the theory of the motion of molecules and particles. In 1917, Einstein applied the general relativity to model the structure of the universe as a whole. The fruitful scientific publications of Albert Einstein, as well as his great intelligence and originality have made the word "Einstein" synonymous with genius.