Near infrared light consists of a light beyond the visible red light (wavelengths greater than 780nm). Contrary to popular thinking, near infrared photography does not allow the recording of thermal radiation (heat). Far infrared thermal imaging requires more specialized equipment. Infrared images exhibit some different effects that give them an exotic, ancient look.
Plant life looks completely white because it reflects almost all infrared light (due to this effect, infrared photography is commonly used in aerial photography to analyze crop yields, pest control, etc.). black black because there is no scattered infrared light. The human skin looks pale and ghostly. The dark sunglasses almost disappear in the infrared because they do not block any infrared light, and it is said that you can capture the near infrared emissions of a common iron.
Infrared photography has existed for at least 70 years, but until recently it has not been easily accessible to those who are not versed in traditional photographic processes. Because the charge-coupled devices (CCDs) used in digital cameras and camcorders are sensitive to near-infrared light, they can be used to capture infrared pictures.
With a filter that blocks all visible light (also called a "cold mirror" filter), most modern digital cameras and camcorders can capture infrared pictures. In addition, they have LCD screens, which can be used to preview the resulting image in real time, a tool that is not available in traditional photography without using filters that allow visible light (red).