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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Despite this flaming victory, the Air Force abandoned the idea; but the Navy took over the scheme and practiced launching bats from aircraft carriers until the actual day of the atom bomb.
Why do you think America's use of the atom bomb in World War II remains so controversial?--
* A `crash programme' (after the Gulf War) aimed at diverting safeguarded research reactor fuel and recovering weapons-grade uranium for use in an atom bomb.
The key word here is "may." History is littered with one-way futurists who claimed the machine-gun, strategic bombing, or atom bomb, would win or end all wars.
Three days later, another atom bomb reduces Nagasaki, Japan, to rubble.
Yet when Americans scoured German military installations after the war, they discovered to their astonishment only a small research reactor, hardly even the first step toward an atom bomb.
1981: Margaret Thatcher's Conservative Government withdraws plans to close 23 pits in its first major U-turn BORN YOKO Ono, Japanese artist, 1933, above JOHN Travolta, US film actor, 1954 ROB Andrew, English rugby player, 1963 DIED ROBERT Oppenheimer, atom bomb inventor, 1967 MARY Stewart, Scottish queen, 1587 MARTIN Luther, religious reformer, 1564, above
"We believe the country is only protected by the public and not through's important to respect the people's will...just having an atom bomb and a lot of weapons won't help the country in any meaningful way."
I told them I served with the REs in the late 50s and apart from my time in the Pacific and the atom bomb tests, I had a quiet ride.
considered detonating an atom bomb on the moon as a display of America's Cold War muscle.
Q league does not have Army, Atom Bomb or US but they have made the country, he emphasized.
TWENTY five years ago I interviewed a Litherland services veteran, who made a perfectly credible prima facie case that his chronic lung condition had been caused by British atom bomb tests in the Pacific and Australia, during the 50s.