ELECTROMAGNETIC SPECTRUM Definition & Meaning

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electromagnetic spectrum

noun

the entire spectrum, considered as a continuum, of all kinds of electric, magnetic, and visible radiation, from gamma rays having a wavelength of 0.001 angstrom to long waves having a wavelength of more than 1 million km.

electromagnetic spectrum

noun

the complete range of electromagnetic radiation from the longest radio waves (wavelength 10 ⁵ metres) to the shortest gamma radiation (wavelength 10 ^–13 metre)

electromagnetic spectrum

The entire range of electromagnetic radiation. At one end of the spectrum are gamma rays, which have the shortest wavelengths and high frequencies. At the other end are radio waves, which have the longest wavelengths and low frequencies. Visible light is near the center of the spectrum.

electromagnetic spectrum

The family of electromagnetic waves. The electromagnetic spectrum, starting from the waves with the longest wavelengths (and least energy), consists of radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma radiation. Members of the family differ from one another only in their wavelength, or frequency. For example, the wavelength of blue light is roughly half that of red light, but the waves corresponding to the two colors are otherwise identical.

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51�Թ� History and Origins

Origin of electromagnetic spectrum¹

First recorded in 1935–40

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Example Sentences

Examples have not been reviewed.

So they argue Diego Garcia's satellite communications would be threatened because the UK relies on a UN authority in Geneva to get access to a particular electromagnetic spectrum.

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Instead, Carr stressed making electromagnetic spectrum available for commercial use through public auctions, a program that had largely stalled under President Biden.

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Although humans can't see them, radio waves are a form of light in the sense that they are part of the electromagnetic spectrum, which also includes X-rays and gamma rays.

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Webb’s four astronomical instruments observe in the near- to mid-infrared part of the electromagnetic spectrum, allowing it to see much farther in space and further back in time than Hubble.

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But unlike any other known pulsar, Medvedev said the Crab Pulsar features a zebra pattern -- unusual band spacing in the electromagnetic spectrum proportional to band frequencies, and other weird features like high polarization and stability.

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electromagnetics electromagnetic unit

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