Link to comic: https://xkcd.com/2821/
this post was submitted on 29 Aug 2023
675 points (97.9% liked)
xkcd
8773 readers
35 users here now
A community for a webcomic of romance, sarcasm, math, and language.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
It's to do with light paths and diffraction. The time maximising path still hast to be a valid path.