That's very, very small. The entire range of frequencies and or wave length of electromagnetic waves is the electromagnetic spectrum. A lot of us know light as a range of frequencies that can be seen by human beings. These waves of light have very high frequencies. They're always from 400-700 nm.
Infrared lights are waves with frequencies that are a little lower than human vision.
Ultraviolet rays are the opposite. Our eyes see a slightly different color with each wavelength or frequency of visible light. The very longest wavelength that humans can see is a deep red that is about 700 nm long and the very shortest is violet or deep blue which is about 400 nm long. Our eyes respond best to light that is green which is 550 nm long. You could describe them as packets of light energy.