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I think a great misconception has been perpetrated (I had it too, don't worry) by people talking about "infrared" as if it were interchangeable with the word "heat." "Thermal radiation" comes off of all bodies at finite temperature in a phenomenon known as "black body radiation." If the body is hot, this radiation becomes higher energy, which is why objects ...


Thermal imaging is just seeing far-infrared radiation emitted by warm objects. This is just another form of electromagnetic radiation, like light. As with light, it will pass through some substances (but not normal glass), be absorbed by some surfaces, and reflect off other surfaces.

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