Definition: (1) Noun: that part of the electromagnetic spectrum, usually taken to be from about 380 - 760 nm (420nm to 760nm for older people), that can be sensed by human eyes by the stimulation of the receptors of the retina and give rise to visual sensations. It is radiant energy by which human vision operates. * Light of different wavelengths are perceived as light of different colours: red light has wavelengths of about 700nm, blues have wavelengths of about 400nm and so on. (2) Verb: to supplement, subtract and otherwise manipulate sources of light and light-shapers to alter the illumination on a subject in order to add to or change the meaning, mood or appearance of an image of the subject.

Related Terms: light-shaper

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