I've been reading the "Rain" series of contemporary fiction novels, and Rain (an assassin) has a detector he keeps in his pocket that "detects" some kind of wave length (side-band? or similar I think it was called) that video camera's produce. The detector also detects audio surveillance. The author never differentiates between wireless and hard-wired devices, this little thing picks up everything within about 10 meters or so if I recall correctly.
I'm just wondering if that is actually possible or if it is literary license. If it is possible, how?
Turn out the lights, hold a light right in front of your eye pointed away from you, look for lens glare.
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