Why has the atomic bomb not been use since?
There is no reason for its use.
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The fission style bomb (atomic bomb) has been obsolete since the invention of the hydrogen fusion (thermonuclear) bomb. Many countries have nuclear capabilities. However, no n…uclear weaponry has been used against anyone since the dropping of the two atomic bombs on Japan in 1945. . The above answer is quite correct, but they asked whether it is banned or not so, yes it is banned because of the side effects of the bomb, it makes the place where the bomb had exploded unlivable for a few months or maybe even years. . Firstly, fission-only bombs are NOT obsolete; in fact, they form the majority of low-yield designs (primarily those intended for tactical battlefield use). In addition, the fusion-"boosted" fission bomb is now the standard for mid-yield bombs (low-100s kT range), due to its simplicity and much smaller size vs a hydrogen weapon. Hydrogen weapons (which, in almost all cases, are designed as the 'fission-fusion-fission' concept) become prevalent at yields above 300kT, and used solely at design yields above 500kT. Secondly, no form of nuclear weapon has been banned by any international treaty, and thus, they are perfectly legal weapons of war. Specific uses of nuclear weapons may be considered illegal, but the weapons themselves are not. Certain countries have either disclaimed use, or legally forbidden use or development by themselves or disallowed them on their territory, but this is exclusive to those countries, and aren't international agreements.
There was an initial sense of euphoria and invincibility. And then the question sank home, what if someone else cracks the atomic weapons secrets. Fear and a need for self def…ense against such a scenario was immediate.
The only time a nuclear bomb has been 'used' to attack anyone was at Hiroshima and Nagasaki in 1945. Subsequently the US, Russia, and UK all carried out above ground tests, be…fore all tests started to be done underground. Recently North Korea detonated a nuclear bomb as an underground test but will never launch one because then Russia would launch a nuke at Korea causing massive nuclear war. This would depend on where N Korea sent its bomb, I don't know why they would attack Russia and it would be suicide if they did. Their most likely target would be S Korea.
More than 1000.
In World War II and as a deterrence tactic.
Japan in World War II.
Which event is considered the closest that the US has been to using an atomic bomb since World War 2?
You need to check the Doomsday Clock for verification, but I think the closest one which the public was made aware of was the Cuban Missile Crisis of 1962.
They have learned better.
What effect did the bombing of hiroshima and nakasaki have on other nations to not use the bomb and how has the atomic bomb been used since then?
Even though many have it now, the bomb has never been used again , and I hope never will it be used.
The use of atomic weapons against other human beings set a precedence that is in direct contradiction of the "Moral Imperative" .
In World War 2
The US took over three years to go from concept of designing an atomic bomb to the actual production of three atomic bombs in World War 2. They started discussion in 1941 with… scientists who had warned them Germany was building an atomic bomb. They began setting up a place for production in 1942. In August of 1945 the bombs were dropped on Nagasaki and Hiroshima in Japan. The atomic bombs were built by the thousands during the cold war. After the cold war, thousands were dismantled but there are still atomic missiles around world wide. See the link below.
In World War 2
3rd bomb was in San Francisco on August 18, 1945 for delivery to Tinian. It might have been about a week later before it was dropped. 3 more bombs were to be ready in Septem…ber 1945. 3 more bombs were to be ready in October 1945. 7 more bombs were to be ready in November 1945. 7 more bombs were to be ready in December 1945. The US was ready and had the ability to have dropped 23 atomic bombs on Japan in 1945. Who knows what the 1946 production schedule have been? See: Swords of Armageddon by Chuck Hansen.
In Japan in WW2
Nagasaki was bombed a few days later. That was the last time an atomic bomb was used in war. All atomic bombs used since then were detonated in remote areas or underground for… tests.
In World War 2
What has the US learned about the use of the atomic weapons since the atomic bomb was dropped on Hiroshima?
They learned not to drop atomic bombs even through their silly nuclear arms race during the Cold War. Trust me no one wants to send off an atomic missile because a huge part o…f the world would be annihilated.
In World War 2
No, but now we have two types of atomic bombs: fission and fusion. The world war 2 bombs were only fission.