5. Fallout Isn't The Same As Radiation (Sometimes)
important thing to remember is that fallout does not refer to
radiation itself but the means by which radiation is spread. The term
fallout has even been used to refer the ash falling out of the sky
after a volcano eruption.
fallout refers to the particles that are made radioactive by blast of
a nuclear explosion. These particles can be made up, depending on how
close they were from the centre of the blast, of soil, general debris
and the material used to make the device that caused all the mess.
It's basically the first thing to worry about after a nuclear bomb
goes off, if you're still alive to know what's going on anyway.
of these particles will be thrown upward by the initial force of the
blast and will eventually fall back down to the surface, thus the
term 'fallout'. The visible fallout will generally appear as ash or
soot falling post-boom.
are three kinds of fallout: local, tropospheric and stratospheric.
Local is very intense and relatively short-lived: generally the
closer to the centre of the explosion, the faster poop's going to
come down. The other two types of fallout are tropospheric and
stratospheric which tend to be made up of finer particles higher up
in the Earth's atmosphere, spread over a greater area and take longer
to actually fall back down to the surface.