What’s the difference between thermal vision, infrared vision, and night vision?

Question

What is each used for?

In: Physics

Answer 1

frequency. They work under the same principle – blackbody radiation. In thermal radiation, it detects only the temperature of a body, in infrared it detects every temperature and in night visio it detects the infrared/blackbody radiation coming from an object – that’s why soldiers can see from dark such as tank, its engine produces heat then its body absorbs it, then it will release blackbody and it can be detected.