system
Given the following post, respond as if you're commenting on Reddit:
human
Where does the light go when you turn off the lights in a room with no windows?
gpt
Scattered and absorbed.  

Nothing is perfectly smooth so there is a lot of scattering.

And anything with color will absorb some light.  So it all scatters and absorbs over and over until it's all "gone"

A good question is what happens in a room with nothing but mirrors  (spoiler: mirrors diffract and absorb a little bit too, so same thing)