wavelength dispersive spectrum

The dispersive spectrum of visible light is red, orange, yellow, green, cyan, blue and violet in turn. The corresponding wavelength (frequency) is listed in the following table. It is necessary for students studying optics to remember the correspondence between visible light color and wavelength.

wave length colors the wave length of visible light

Violet: 380–450 nm (688–789 THz frequency)
Blue: 450–495 nm
Green: 495–570 nm
Yellow: 570–590 nm
Orange: 590–620 nm
Red: 620–750 nm (400–484 THz frequency)
Violet light has the shortest wavelength, which means it has the highest frequency and energy. Red has the longest wavelength, the shortest frequency, and the lowest energy.