Infrared photography sits at the heart of modern paranormal investigation. It's one of the most widely used techniques on ghost hunts, mainly because it allows investigators to see and record scenes in near-darkness without relying on visible light. It's the look you see on TV, the green-tinted or monochrome footage of investigators walking through dark corridors, picking up details the naked eye can't see.

Although IR imaging is now almost taken for granted, understanding how and why it works helps you use it properly and avoid some of the most common mistakes that lead to misleading or unusable evidence.Despite the reputation they have within the paranormal field, night vision cameras don't reveal hidden worlds or detect anything supernatural by default. In fact, they work on exactly the same principles as your eyes: light reflects off an object, enters a lens, and is turned into an image.

The only real difference is the...