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What area of wavelength on the electromagnetic spectrum is cosmic background radiation found?

April 26, 2017area background cosmic electromagnetic spectrum radiation

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What area of wavelength on the electromagnetic spectrum is cosmic background radiation found?

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Cosmic background radiation is composed of microwaves that have a long wavelength, though not as long as radio waves. It has now cooled so that its temperature today is 2.73K and its peak wavelength is near 1.1mm. Keep sending those smart questions!