This stack exchange question shows everything wrong with SE and why I no longer use it. 99% of the answers are sophistry. Along the lines of "I'm authoritativ

This stack exchange question shows everything wrong with SE and why I no longer use it. 99% of the answers are sophistry. Along the lines of "I'm authoritative" "You need to respect my job title" "I mentioned a pop culture icon so updoot me" "I don't believe in imaginary property so here's a stolen encyclopedia article that doesn't even apply to your question" "Here's someone else's picture, but at least I gave them citation credit" "savaged for not providing his answer in the form of an answer and various other site meme infractions that don't matter to people outside SE" "The usual making fun of the asker for asking a question too poorly to properly answer" PlasmaHH provides the only answer, and its only a partial answer, that they personally used mirrors to turn the UV band on some UV-sensitive ink on money and it lit up, so yeah rainbows clearly output enough UV to activate currency inks. Cool experiment and it answers the question! As for the UV, if it were not for PlasmaHH's IRL experimental results I'd think air and rain would filter UV and IR pretty effectively in general such that you'd get no UV and some narrow "water-proof" IR transmission bands (think of how military FLIR sees thru clouds in specific narrow IR bands but in general IR is blocked by water pretty well, clearly the bottom of the ocean is not cooked by sunlight all the heat gets dumped in the first few feet of water) I know from optical fiber work that non-linear stuff is stereotypically non-linear so its possible the rainbow doesn't emit all wavelengths of EM radiation; an ideal prism or droplet would, but its not ideal, so ... Experimentally I've never heard of a microwave relay path having its SNR knocked down by GHz range "rainbow interference" or wifi does not shut down for miles because there's rainbow interference. Certainly aircraft navigation does not shut down because of rainbow interference. At some frequency range, the total light energy emitted over the life of the rainbow drops below one photon's worth across that range, so you don't get to detect it, so you could usefully argue its not there. It could be fun, but its stack exchange, so its not fun.