E=mc2

Albert Einstin major contribution was the special theory of relativity. He showed that the physical quantities like mass, length and time are not constant, but vary with the velocity of the body. He established the equivalence of matter and energy. The interconnection of mass and energy was embedied in the formula E=mc2 where E is energy, m is the mass and c, a constant equal to the velocity of light. The atomic bomb was the result of this equation. He also explained in one of his papers the way the force of gravity works.

In 1933, in Germany the dictatorship of Hitler was found intolerable. Einstein opposed it. The conditions of Jews were miserable. Einstein when to America on an invitation to deliver a lecture. He be punished. He held a high post in Princeton University till 1945. There he worked on the development of Atom Bomb. When he found the harmful and disastrous effect on the bomb on the two cities of Japan he became very sad and decided to advocate only the peaceful users of atomic energy. Einstein died on April18, 1955. An element Einstein has been named after him. He is sometimes called the father of modern physics.