What are the blast radiuses of an atom Bomb and a hydrogen bomb?
These entirely depend on the type/size/method of detonation of the bomb. Both Fission and Fusion bombs can create similar lower end yields but you need to use Fusion bombs to give yourself Megaton equivalent nuclear bombs (there’s a limit to the output of military useable fission bombs ~50kT) or higher. An air detonated bomb gives you a larger blast radius than a ground detonated one as the surrounding ground and scenery (trees/buildings) will absorb some of the blast. To illustrate this a 1MT (million Tons) bomb detonated at 3000ft has the same blast effect (on the ground) as a 10MT bomb detonated at 6000ft. It’s all about optimum height (which I’ll assume bombs are detonated at for the examples given at the end). For Fission the maximum output for a useable military bomb is about 50 kilo Tons (kT). A Ton is the blast equivalent in weight of normal TNT explosives and a kilo is one thousand, this makes 1 kiloton the equivalent of 1000 tons of TNT. You can however “boost” these weapons
