ALBERT EINSTEIN(1879-1955):-
Once he climbed a ladder to change the picture on the wall. His foot slipped and he fell to the floor. Quickly recovering from the fall he began working to the causes of the fall. He was Albert Einstein.
Einstein was born at Ulm in Germany. Right from his childhood he was interested in science. he was sharp in mathematics and mediocre in other subjects.He completed his education in 1900 and became a citizen of Switzerland where he tried for admission in Zurich university. He joined the Swiss patent office as a clerk. He married a science student Melva marec. In 1905 he got his doctorate degree from Zurich university. By that he had published five research papers which made him a famous scientist as he showed that when light falls on metals like tungsten etc. they emit photo electrons and the effect is called photo electric effect. He was awarded the Nobel prize in 1921 for his discovery of the Law of Photo electric effect.
His major contribution was the special theory of relativity. He showed that the physical quantities are not constant, but vary with the velocity of the body. The interconnection of mass and energy was embedded in the equation E=mc2 where E is energy, m is mass and c, a constant equal to the velocity of light. The atomic bomb was the result of the equation.
Einstein died on April 18, 1955. An element Einsteinium has been named after him. He is some times called the Father of Modern Physics
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