>>76279868>You have no idea how sunscreen workselectron energy levels, broadly. More specifically the HOMO-LUMO gap lines up in a few conjugated compounds (like octasylate) and a few metal compounds (like zinc oxide) with the energy transmitted by UV photons. It's high school level chem, dipshit.
When no study is willing to tell you WHY a thing happens, and is paid for by people who produce the thing, it's probably a lie.