VISIBLE LIGHT

area of light which a human eye can perceive (Physics)

The visible spectrum (or sometimes optical spectrum) is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths in air from 380 to 780 nm. The corresponding wavelengths in water and other media are reduced by a factor equal to the refractive index. In terms of frequency, this corresponds to a band in the vicinity of 450-750 terahertz. A light-adapted eye generally has its maximum sensitivity at around 555 nm, in the green region of the optical spectrum (see: luminosity function). The spectrum does not, however, contain all the colors that the human eyes and brain can distinguish. Brown, pink, and magenta are absent, for example, because they need a mix of multiple wavelengths, preferably shades of red.
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Visible light, n the radiant energy in the electromagnetic spectrum that is visible to the human eye. [more]Visible light - Community and Resources

Noun
1. (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"
(synonym) light, visible radiation
(hypernym) actinic radiation, actinic ray
(hyponym) beam, beam of light, light beam, ray, ray of light, shaft, shaft of light, irradiation
(part-holonym) electromagnetic spectrum
(classification) physics, physical science, natural philosophy

Electromagnetic Waves with a Wavelength of 450 to 700 nanometers.