WORLD HISTORY

Detailed explanation-1: -Einstein’s 1939 letter helped initiate the U.S. effort to build an atomic bomb, but work proceeded slowly at first.

Detailed explanation-2: -Thomas Powers describes the situation as, “A single lurid fear brought the American decision to undertake the vast effort and expense required to build the atomic bomb-the fear that Hitler’s Germany would do it first” (Powers VII). However, history is clear on this point. Germany did not produce any atomic bombs.

Detailed explanation-3: -J. Robert Oppenheimer (1904-1967) was an American theoretical physicist. During the Manhattan Project, Oppenheimer was director of the Los Alamos Laboratory and responsible for the research and design of an atomic bomb. He is often known as the “father of the atomic bomb.”

Detailed explanation-4: -During World War Two, “atomic bomb” usually meant a bomb that relies on fission, or the splitting of heavy nuclei into smaller units, releasing energy. The action happens in the nucleus of the atom, so it is probably more accurate to call these “nuclear bombs.”

Detailed explanation-5: -The United States dropped an atomic bomb on the city of Hiroshima and Nagasaki on 6th and 9th August 1945. It was done to force Japan to surrender because Japan was not ready to surrender unconditionally. Due to its devastation and huge loss Japan unconditionally accepted the surrender on August 14, 1945.