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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Electromagnetic Waves with a Wavelength of 450 to 700 nanometers.

The range of electromagnetic radiation to which our eyes are sensitive. We perceive it in colours, ranging from violet at approximately 400 nanometres in wavelength , through yellow at 500 nanometres wavelength, to red at 700 nanometres wavelength. The range is bounded by ultraviolet which has a wavelength of less than 400 nanometres and infrared which has a wavelength of greater than 700 nanometers.

Visible light is electromagnetic radiation with a wavelength between 400 and 750 nm.