Infrared is possibly the most important range in the electromagnetic spectrum for paranormal investigators. Not only does it give investigators the power of night vision, but it also allows for heat sensing technologies like infrared thermometers and thermal imaging cameras.Any night vision video camera uses an active source of illumination, which is in or near the infrared band. This is usually in the form of an external top light mounted on the camera or a small in-built illuminator on consumer camcorders. This frequency of light is just outside the visible spectrum of the human eye, but it can be picked up by the camera's sensor. So, although the scene looks dark to you, your camera will see a brightly lit space.

Video captured using this method appears in monochrome, either with a greenish tint or in black and white. This is because the camera cannot see visible light when in night...