Well, Numberphile says they appear all over physics. That’s not actually true. They appear in like two places in physics, both deep inside QFT, mentioned here.
QFT uses a concept called renormalization to drop infinities all over the place, but it’s quite sketchy and will probably not appear in whatever final form physics takes when humanity figures it all out. It’s advanced stuff and not, imo, worth trying to understand as a layperson (unless you already know quantum mechanics in which case knock yourself out).
Well, Numberphile says they appear all over physics. That’s not actually true. They appear in like two places in physics, both deep inside QFT, mentioned here.
QFT uses a concept called renormalization to drop infinities all over the place, but it’s quite sketchy and will probably not appear in whatever final form physics takes when humanity figures it all out. It’s advanced stuff and not, imo, worth trying to understand as a layperson (unless you already know quantum mechanics in which case knock yourself out).
All I ever covered in university was taking the Scrodinger equation and then quantum physics did whatever that equation said.