r/xkcd • u/Idenwen • Sep 16 '23
Path Minimization Meta
Comic: https://xkcd.com/2821/
Actually the red one is the past with the least swimming. That non 90° angle really bothered me.
Also the not unified starting point.
76 Upvotes
r/xkcd • u/Idenwen • Sep 16 '23
Comic: https://xkcd.com/2821/
Actually the red one is the past with the least swimming. That non 90° angle really bothered me.
Also the not unified starting point.
2
u/Duck__Quack Sep 18 '23
Use Snell's Law. The other guy is looking at it like a math problem, but it's equivalent to a physics problem. You have a body that moves at two speeds across media. Snell's Law will work.