Eli5: Why are nighvision goggles usually green?
In: 8
it’s a green phosphor screen at the back end of the goggles which glows green when electrons hit it. There are other variants like white phosphor and very rare red phosphor ones. The light enters the front lens which hits a photocathode which turns the light into electrons. Those electrons hit a microchannel plate which is a plate with millions of very tiny holes measuring a handful of microns across. The electrons do some magic bouncing off the sides of those holes it amplifies the electron output. Those electrons then run into the phosphor screen and turn into visible light.
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