The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view. More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from to nanometers.
Understanding the Colors That Make Up White Light
A spectral color is a color that is evoked in a typical human by a single wavelength of light in the visible spectrum , or by a relatively narrow band of wavelengths, also known as monochromatic light. Every individual wavelength of visible light is perceived as a spectral color, in a continuous spectrum; the colors of sufficiently close wavelengths are indistinguishable for the human eye. The spectrum is often divided into named colors, though any division is somewhat arbitrary; the spectrum is continuous. Traditional colors in English include: red , orange , yellow , green , blue , and violet. In some other languages the ranges corresponding to color names do not necessarily agree with those in English. The division used by Isaac Newton , in his color wheel , was: red, orange, yellow, green, blue, indigo and violet; a mnemonic for this order is " Roy G. Biv ".
Electromagnetic Spectrum Series
Newton demonstrated that colour is a quality of light. To understand colour, therefore, it is necessary to know something about light. As a form of electromagnetic radiation , light has properties in common with both waves and particles. It can be thought of as a stream of minute energy packets radiated at varying frequencies in a wave motion. Any given beam of light has specific values of frequency , wavelength, and energy associated with it.
Color American English , or colour Commonwealth English , is the characteristic of visual perception described through color categories , with names such as red , orange , yellow , green , blue , or purple. This perception of color derives from the stimulation of photoreceptor cells in particular cone cells in the human eye and other vertebrate eyes by electromagnetic radiation in the visible spectrum in the case of humans. Color categories and physical specifications of color are associated with objects through the wavelengths of the light that is reflected from them and their intensities. This reflection is governed by the object's physical properties such as light absorption , emission spectra , etc. By defining a color space , colors can be identified numerically by coordinates, which in were also named in global agreement with internationally agreed color names like mentioned above red, orange, etc. The photo-receptivity of the "eyes" of other species also varies considerably from that of humans and so results in correspondingly different color perceptions that cannot readily be compared to one another. Honey bees and bumblebees have trichromatic color vision sensitive to ultraviolet but insensitive to red.