system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the picture in night vision goggles green?
gpt
When the light enters the goggles, it's converted to electricity, then boosted electrically, then the light hits a phosphor screen (like the screen part of old school CRT displays) and converted again to light. There's no way to preserve the color, so it's effectively a black and white image, but it's converted to Green because our eyes see better contrast that way.