system
Given the following post, respond as if you're commenting on Reddit:
human
If two people are in a dark room and a single photon is fired to the wall. Which person sees/absorbs the photon?
gpt
Well, one photon doesn't register for human eyes, so no one will see it regardless of absorption...

The photon *appears to* travel in a straight line, so it would hit whoever it is pointed at... if it is not pointed directly into one of the eyes, it would just be absorbed by a wall or their clothing or whatever.

If you however are talking something like a double slit experiment, then it would be random which detector absorbs a specific photon, if they have equal chance to.