The emission spectrum of the Sun

The Sun emits electromagnetic radiation over a wide range of wavelengths.

The maximum in the solar emission spectrum is at about 500 nm, in the blue-green part of the visible spectrum.

As well as visible light, the Sun emits ultra violet radiation and infra red radiation.

Visible light covers the range from about 400 nm (blue light) to about 700 nm (red light).

Ultra violet radiation covers the range from about 10 nm to about 400 nm.

Ultra violet radiation is commonly divided into three ranges: UV-A, UV-B and UV-C. Of these three ranges, UV-C has the highest energy and the shortest wavelength.

Infra red radiation covers the range from about 700 nm to about one million nanometres (equivalent to a wavelength of one millimetre).

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