system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does a thermal camera work?
gpt
You know how hot things can glow red and very hot things might even glow white hot. The same effect works with colder things as well. But instead of glowing in red they glow in infrared. A thermal camera is a camera which does not capture the regular red, green and blue color bands but rather captures several infrared color bands. And by looking at what colors of infrared they glow it can determine what the temperatures are.