Atom Bomb

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atomic bomb

, atom bomb
a type of bomb in which the energy is provided by nuclear fission. Uranium-235 and plutonium-239 are the isotopes most commonly used in atomic bombs

Atom Bomb


a bomb with a nuclear charge dropped from aircraft. The first atom bombs were made in the USA at the end of World War II. The explosion of an atom bomb releases a tremendous amount of nuclear energy. In July 1945 the Americans tested the atom bomb and then dropped two bombs with the equivalent of 20,000 tons of TNT on the Japanese cities of Hiroshima (Aug. 6) and Nagasaki (Aug. 9, 1945). The explosion of the atom bombs caused great destruction in these cities and enormous casualties among the peaceful civilian population. More than 140,000 people were killed or wounded in Hiroshima and about 75,000 in Nagasaki. Subsequently several hundred thousand people died as a result of the aftereffects of the atomic bombardment. The use of the atom bombs was not caused by any military necessity. The American ruling circles gambled on a temporary US monopoly in nuclear weaponry and tried to use it to intimidate freedom-loving peoples. But the atomic “secrets” were discovered as early as 1947 by Soviet scientists headed by Academician I. V. Kurchatov; in August 1949 the USSR made an experimental explosion of an atomic device, which led to the end of any possibility of atomic blackmail. The term “atom bomb” is now rarely used.

References in periodicals archive ?
Nevertheless, those hibakusha, atomic bomb survivors, whose bodies were eaten away by radiation, and who continue to suffer from the aftereffects, can never forget that day.
To help students understand the development of the atomic bomb, both the technical hurdles scientists faced and the human drama associated with the decision to use it.
Fortunately, President Harry Truman had the courage to order use of the atomic bomb against the last holdout, Japan.
In October last year the city of Coventry inaugurated a Peace Month and a Hiroshima Nagasaki Atomic Bomb Exhibition, which was officially opened by the Japanese Ambassador to the UK, Masaki Orita.
There were three months in which to see if Japan would surrender before a decision between atomic bombs and ground invasion would have to take place.
But this decline in American support for the use of atomic bombs against Japanese cities did not mean Americans thought they had to apologize for having done so.
The United States dropped atomic bombs on Hiroshima on Aug.
Unlike other Oppenheimer biographies, which begin with the Manhattan Project that he directed and end with the first explosions of atomic bombs, this book examines Oppenheimer's entire life.
dropped two atomic bombs on Japan, which then surrendered, saving probably millions of lives.
United States drops atomic bombs on Hiroshima, Nagasaki: Japan surrenders to end World War II, 1945.
That there was no alternative to dropping the atomic bombs on two Japanese.