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vldx
on Jan 17, 2019
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How to Find Hidden Cameras and Spy Gear
I’ve done the same and had the exact same experience. What is the reason for that?
borgel
on Jan 17, 2019
[–]
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
on Jan 17, 2019
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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.
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