I Built a CIA Spy Device (Laser Mic)
6:06
YouTubeSomethingAboutScience
I Built a CIA Spy Device (Laser Mic)
In this video, I build a laser microphone, a device that can pick up sound from a distance using just a laser and receiver. This technology was first used during the Cold War by the KGB and is still used today. By shining a laser beam at a window, sound waves inside the room cause tiny vibrations that modulate the reflected light. Using a ...
1M views8 months ago
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