Here’s the simple part: bacteria are just tiny bags of DNA, kind of like little water balloons filled with genetic instructions. When UVC light hits them, it doesn't just warm them up—it literally smashes the bonds in their DNA.
Imagine a zipper that’s been yanked apart. The DNA strand becomes a broken mess of mismatched puzzle pieces. Without intact DNA, the bacteria can't replicate, can't reproduce, and basically dies—or at least becomes harmless zombie germs that can't hurt you.
It’s like giving the bacteria a lethal sunburn from the inside out. Pretty wild, right?
