Einstein was one of the fathers of the atomic age. He was one of the greatest scientists of all time. In 1905 Einstein contributed three papers to Annalen der Physik (Annals of Physics), a German scientific periodical. Each of them became the basis of a new branch of physics.
Einstein treated matter and energy as exchangeable. Albert Einstein became famous for the theory of relativity, which laid the basis for the release of atomic energy.
In 1905 Albert Einstein formulates Special Theory of Relativity.
He established law of mass- energy equivalence; through his famous formula E=mc²
Einstein calculates how the movement of molecules in a liquid can cause the Brownian motion.