@permoda12345,
Quote:Are we looking at the reflection
The "reflection" isn't like thrown balls "bouncing" back from off a wall, though. Photons are absorbed by atoms and then photons are re-emitted. Plenty of free electrons on the metal coating behind the glass, so the range of visible frequencies is "reflected" with the full details (of "you") surviving the process.
Quote: of the light of our bodies?
Your body at least radiates heat. Not a good thing if it also produced light that somebody else could see by, as if it were a torch.