I’ve heard people say there is no fallout, but there typically is a fission bomb in the secondary stage. Where does its radiation go? Is it just blown away by the fusion bomb so it’s no longer as deadly? Isn’t it still there though? Is it just weaker?
In: Physics
So a hydrogen bomb has a fission section which “ignites” the fusion section, but the fusion section is wrapped in a heavy metal. Sometimes this is natural uranium which fissions as well and produces lots of radioactive isotopes plus a lot of the power released by the bomb.
There may be lower fallout designs in use now that don’t have the same wrapper and use radiation instead of blast pressure to kill people without as much infrastructure damage.
There have also been designs that produced extra fallout but these probably haven’t been built.
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