I've decided to also post interesting videos, pictures, whatever. These will have titles "Something Cool N".
Today's subject is a cool trick for seeing infrared light.
Infrared is a type of electromagnetic radiation. It is invisible to the naked eye because it has a longer wavelength than visible light, so it is outside of our range. It is commonly depicted as thermal radiation, such as those airport machines that check your body temperature to make sure it's not abnormally high. Although our eyes aren't capable of seeing infrared light on their own, cameras are able to detect it thanks to their infrared filters.
Oooo purple.
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