by: Davis and Max
Fun facts: 1. Often night glasses also have a fairly large exit pupil of 7 mm or more to let all gathered light into the user's eye. 2. Night vision goggles are green because humans can see more shades of green than any other color. 3. The view through a passive night vision device may be from 20,000 to 50,000 times brighter than what the unaided eye could see.
How the EM waves are used in the device: Infrared waves reflect off the human skin and objects allowing us to see in the dark.
EXTRA: What Max and I look like underneath an Night Vision infrared camera.