Absorption spectrum



the spectrum formed by electromagnetic radiation that has passed through a medium in which radiation of certain frequencies is absorbed.
Historical Examples

The liquid is without colour, and gives no absorption spectrum.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 7 Various

This colour possesses an absorption spectrum (figured at p. 55).
Poisons: Their Effects and Detection Alexander Wynter Blyth

It is conspicuous by its absorption spectrum in many of the white stars.
Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 Various

noun
the characteristic pattern of dark lines or bands that occurs when electromagnetic radiation is passed through an absorbing medium into a spectroscope. An equivalent pattern occurs as coloured lines or bands in the emission spectrum of that medium

absorption spectrum n.
The electromagnetic spectrum, broken by a specific pattern of dark lines or bands, observed when radiation traverses a particular absorbing medium.
absorption spectrum
The range of frequencies of electromagnetic radiation readily absorbed by a substance by virtue of its chemical composition. See more at atomic spectrum.

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