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electromagnetic spectrum

An electromagnetic spectrum is defined as the entire range of electromagnetic waves from low to high frequency.

(noun)

An example of an electromagnetic spectrum is the low frequency radio to the high frequency gamma ray waves.

See electromagnetic spectrum in Webster's New World College Dictionary

the complete range of frequencies of electromagnetic waves from the lowest to the highest, including, in order, radio, infrared, visible light, ultraviolet, X-ray, and gamma ray waves

See electromagnetic spectrum in American Heritage Dictionary 4

noun

The entire range of radiation extending in frequency from approximately 10²³ hertz to 0 hertz or, in corresponding wavelengths, from 10^-13 centimeter to infinity and including, in order of decreasing frequency, cosmic-ray photons, gamma rays, x-rays, ultraviolet radiation, visible light, infrared radiation, microwaves, and radio waves.

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