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  • Fusion reaction combines isotopes of hydrogen to make helium and release energy. This requires temperatures in the millions of Kelvins to start.
  • Fission reaction breaks up isotopes of heavy elements (Uranium & Plutonium) into lighter elements (fission fragments, a major part of fallout) and release energy. This can start a normal temperatures.
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How is a fission bomb different from a fusion bomb?

A fission bomb relies on nuclear fission (splitting atoms) to release energy, while a fusion bomb relies on nuclear fusion (merging atoms) to release energy. Fusion bombs are more powerful than fission bombs and are often referred to as thermonuclear or hydrogen bombs.


Is the bomb little boy a fission or fusion reaction?

The "Little Boy" bomb used in the Hiroshima bombing was a fission bomb, specifically a gun-type uranium-235 bomb. It relied on the nuclear fission of uranium-235 to release a massive amount of energy.


What is used as a trigger in a hydrogen bomb?

A traditional nuclear fission bomb is used as a trigger in a hydrogen bomb. The explosion from the fission bomb generates the high temperatures and pressures needed to initiate the fusion reaction in the hydrogen bomb.


Detonation of a fusion type hydrogen bomb is started by?

Detonation of a fusion hydrogen bomb is initiated by the primary fission bomb, which generates high temperatures and pressures needed to trigger fusion reactions in the hydrogen isotopes. The fission bomb compresses and heats the fusion fuel to the point where nuclear fusion reactions can occur, releasing vastly more energy than the fission reaction alone.


Is atom bomb different to atomic bomb?

No, "atom bomb" and "atomic bomb" refer to the same type of explosive device that derives its destructive power from nuclear fission reactions. Both terms are used interchangeably to describe the same technology.