Physics

Color and frequency


In the range of the electromagnetic spectrum corresponding to visible light, each frequency is equivalent to the sensation of a color.

As the frequency increases, the wavelength decreases, as shown in the table and the part of the electromagnetic spectrum below.

Color Wave-length
( = )
Frequency
()
Violet 3900 - 4500 7,69 - 6,65
Indigo 4500 - 4550 6,65 - 6,59
Blue 4550 - 4920 6,59 - 6,10
Green 4920 - 5770 6,10 - 5,20
Yellow 5770 - 5970 5,20 - 5,03
Orange 5970 - 5220 5,03 - 4,82
Red 6220 - 7800 4,82 - 3,84

When we receive rays of light of different frequencies we can perceive different colors of these as combinations. The white light that we perceive from the sun, for example, is the combination of all seven colors of the visible spectrum.