It depends on the type of bomb and its designed intentions. There's something called a Cobalt Bomb https://en.wikipedia.org/wiki/Cobalt_bomb that is literally intended to spread as much fallout as possible at the most dangerous energy levels for biological life. On the semi opposite side of the spectrum, Neutron bombs are designed to release a "clean" short blast of energy designed to kill as much biological life as possible while minimizing fallout. Both designs I mentioned are on the more complicated end of the spectrum. The first few generations of non-military peer (that would nuke Israel) designed weapons will likely be super dirty and efficient.
5m of air doesn't do shit if there's wind and you breath shit in bro. 2mm of acrylic doesn't do shit b/c it's not shielding your internal organs from radiation (I'd assume). I think the point your trying to make is that people generally loose their minds over the idea of nuclear fallout? This is true imo but nuclear fallout will still fuck your day up big time.
Edit: Inefficient*
Real life isn't a videogame. I maintain, after two weeks most of the dangerous fallout is gone. There may be some left, but it's not like in a videogame.
Ok guy.
https://en.wikipedia.org/wiki/Cobalt-60
Steel contamination Cobalt is an element used to make steel. Uncontrolled disposal of 60 Co in scrap metal is responsible for the radioactivity found in several iron-based products.[13][14]
Around 1983, construction was finished of 1700 apartments in Taiwan which were built with steel contaminated with cobalt-60. Approximately 10,000 people occupied these buildings during a 9–20 year period. On average, these people received a radiation dose of 0.4 Sv, unknowingly. This large group did not suffer a higher incidence of cancer mortality, as the linear no-threshold model would predict, but suffered a lower cancer mortality than the general Taiwan public. These observations appear to be compatible with the radiation hormesis model.[15]
Repeat after me "real life is not like fallout the videogame"
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