Light is usually referred to as the portion of the electromagnetic spectrum that the human eye can detect. This light is visible. Beyond this range lies the ultraviolet spectrum and the infrared radiation. Infrared photography records the reflected infrared radiation off the subject from a light source such as sun.
Infrared photographs show trees with white leaves and luminous white clouds against black skies: it opens a window on a parallel world intriguingly different to the one we usually see. Visit my gallery and you will find how interesting infrared photos look!