Fraunhofer lines
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Related to Fraunhofer lines: Fraunhofer spectrum
ab·sorp·tion lines
the dark lines in the solar spectrum corresponding to wavelengths originally emitted by inner layers of the Sun but then absorbed by various elements present in gaseous form in cooler layers and in the Earth's atmosphere.
Synonym(s): Fraunhofer lines
Fraunhofer lines
(frown′hōf″ĕr) [Joseph von Fraunhofer, Ger. optician, 1787–1826]
Absorption bands or lines seen in a spectrum, caused by the absorption of groups of light rays in their passage through solids, liquids, or gases.
Fraunhofer,
Joseph von, German optician, 1787-1826.Fraunhofer lines - a number of the most prominent of the absorption lines of the solar spectrum.