While looking up information about black light, I found a video on how you can modify a camcorder to pick up and record infra-red light. The video title is a misnomer, because it's not x-ray vision that the video is talking about. The camera picks up infra-red light that is outside the visible light spectrum on the other side of x-ray light. X-rays have a much higher frequency and shorter wavelength than infra-red.
This made me wonder about things like night vision cameras. Night vision operates in infrared aswell. Night vision cameras pick up thermal-IR, which is emmited by objects depending on their heat.
This is a really great article about night vision:
Most cameras use a process called Image-Encancement night vision to make images, but the artilce also talked about thermal imaging. This thermal imaging produces interesting images which record different shades of grey depending on the heat given off.
These are image-enhancing night vision images:
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