Comment by embedding-shape
19 hours ago
> a ray of light has to know where it will ultimately end up before it can choose the direction to begin moving in
I'm no physicists, so I guess I'll ask it: Why?
Also related, why do some ray of light then "see" a black hole yet decide to head into them anyways, if they saw it before they went in that direction? Seems like a dumb move :)
Its future isn't over there because it moves in that direction, instead it moves in that direction because its future lies over there.
Relatedly:
> [General Relativity] basically says that the reason you are sticking to the floor right now is that the shortest distance between today and tomorrow is through the center of the Earth.
https://physics.stackexchange.com/questions/250800/gr-and-my...