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Ernest Z. Violet light has the shortest wavelength. Visible light has a wavelength range of about 400 - 700 nm. The visible colours from shortest to longest wavelength are: violet, blue, green, yellow, orange, and red.
The electromagnetic waves with shortest wavelengths are called gamma rays. The electromagnetic spectrum runs from radio waves (the longest wavelength) to gamma waves (the shortest wavelength). In increasing wavelength order, the electromagnetic spectrum is: radio waves, microwaves, infrared light, visible light, ultraviolet light, x-rays, and gamma rays. In the visible spectrum, violet light has the shortest wavelength.