Nuclear weapon - Wikipedia
网页Weapons whose explosive output is exclusively from fission reactions are commonly referred to as atomic bombs or atom bombs (abbreviated as A-bombs). This has long been noted as something of a misnomer, as their energy comes from the nucleus of the atom, just as it does with fusion weapons.
Atomic bombings of Hiroshima and Nagasaki - Wikipedia
网页On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki, respectively. The bombings killed between 150,000 and 246,000 people, most of whom were civilians, and remain the only use of nuclear weapons in an armed conflict.
Atomic Bomb: Nuclear Bomb, Hiroshima & Nagasaki ‑ HISTORY
网页2017年9月6日 · An atomic bomb, codenamed "Little Boy," was dropped over Hiroshima Japan on August 6, 1945. The bomb, which detonated with an energy of around 15 kilotons of TNT, was the first nuclear weapon...
Atomic bomb | History, Properties, Proliferation, & Facts
网页2024年8月25日 · atomic bomb, weapon with great explosive power that results from the sudden release of energy upon the splitting, or fission, of the nuclei of a heavy element such as plutonium or uranium.
Bombing of Hiroshima and Nagasaki - HISTORY
网页2009年11月18日 · On August 6, 1945, during World War II (1939-45), an American B-29 bomber dropped the world’s first deployed atomic bomb over the Japanese city of Hiroshima, immediately killing 80,000...
atomic bombings of Hiroshima and Nagasaki - Encyclopedia Britannica
网页2024年8月25日 · atomic bombings of Hiroshima and Nagasaki, during World War II, American bombing raids on the Japanese cities of Hiroshima (August 6, 1945) and Nagasaki (August 9, 1945) that marked the first use of atomic weapons in war.
Nuclear weapon | History, Facts, Types, Countries, Blast Radius ...
网页5 天之前 · A nuclear weapon is a device designed to release energy in an explosive manner as a result of nuclear fission, nuclear fusion, or a combination of the two. Fission weapons are commonly referred to as atomic bombs, and fusion weapons are referred to as thermonuclear bombs or, more commonly, hydrogen bombs.
The Atomic Bombing of Hiroshima and Nagasaki, August 1945
网页2021年6月7日 · The United States bombings of the Japanese cities of Hiroshima and Nagasaki on August 6 and August 9, 1945, were the first instances of atomic bombs used against humans, killing tens of thousands of people, obliterating the cities, and contributing to the end of World War II.
History of nuclear weapons - Wikipedia
网页A nuclear weapon, also known as an atomic bomb, possesses enormous destructive power from nuclear fission, or a combination of fission and fusion reactions.
The Atomic Bomb and the End of World War II
网页2020年8月4日 · Seventy years ago this month, the United States dropped atomic bombs on Hiroshima and Nagasaki, the Soviet Union declared war on Japan, and the Japanese government surrendered to the United States and its allies. The nuclear age had truly begun with the first military use of atomic weapons.
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