Eli5 : How do night vision glasses/goggles work

Question

Eli5 : How do night vision glasses/goggles work

In: Technology

Answer 1

There are two basic types: light amplification and infrared. Infrared (heat energy) is invisible to our vision, but just outside of our vision range. The cameras can pick that up and convert it to a frequency that we can see. This is particularly useful for finding warm-blooded animals (or humans) at night, or machinery, or heat loss from your house, etc.