The electromagnetic spectrum is divided into seven different frequency ranges, which are, from lowest to highest, radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
The electromagnetic spectrum includes electromagnetic waves with frequencies between one hertz and above 10²⁵ hertz, or wavelengths between thousands of kilometers and a small portion of the size of an atomic nucleus. The electromagnetic waves found within each of these bands are referred to by a different name; starting at the low frequency (long wavelength) end of the spectrum, these are radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. This frequency range is divided into separate bands.
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