THEORY BEHIND THE BLACKLIGHT:
The theory behind this equipment in a paranormal investigation is:- To illuminate the buffering zone between our world and the Spirit world using Electromagnetic Resonant, between the 'Upper' and 'Lower' hinges of the invisible spectrum's of light.
SEE THE FULL LIGHT SPECTRUM ABOVE
Full-spectrum photography is a subset of full-spectrum imaging, defined currently among photography enthusiasts as imaging with consumer cameras the full, broad spectrum of a film or camera sensor bandwidth. In practice, specialized broadband/full-spectrum film captures visible and near infrared light, commonly referred to as the “VNIR”. Modified digital cameras can detect some ultraviolet, all of the visible and much of the near infrared spectrum, as most digital imaging sensors are sensitive from about 350nm to 1000nm. An off-the-shelf digital camera contains an infrared hot mirror filter that blocks most of the infrared and a bit of the ultraviolet that would otherwise be detected by the sensor, narrowing the accepted range from about 400nm to 700nm. Replacing a hot mirror or infrared blocking filter with an infrared pass or a wide spectrally transmitting filter allows the camera to detect the wider spectrum light at greater sensitivity. Without the hot-mirror, the red, green and blue (or cyan, yellow and magenta) colored micro-filters placed over the sensor elements pass varying amounts of ultraviolet (blue window) and infrared (primarily red, and somewhat lesser the green and blue micro-filters). A converted full-spectrum camera can be used for ultraviolet photography or infrared photography with the appropriate filters.
INFRARED DIGITAL CAMERA:
Long infrared flashes can only be seen through a Night Vision Camera - Spirits move at a higher frequency and often cannot be seen with the naked eye, using an I/R Camera allows you to see above the visible light spectrum, thus illuminating Ghost matter including Ectoplasm.