4 ms·

I assume it has to do with which side the reflective coating is on? If it's on the room-facing face there is no gap. If it's on the backing (wall-side face) the

by borgel 8y ago

I assume it has to do with which side the reflective coating is on? If it's on the room-facing face there is no gap. If it's on the backing (wall-side face) there is a gap as thick as the glass.

sm4rk0 8y ago
The reflective coating (silver or alumin(i)um) of a glass mirror is usually on its back. Gap should be twice the glass thickness because the light travels the distance twice.