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

[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.


Joseph von, German optician, 1787-1826.
Fraunhofer lines - a number of the most prominent of the absorption lines of the solar spectrum.
References in periodicals archive ?
Still, the continuous nature of its emission, and the absence of Fraunhofer lines in the inner corona has been well documented [2-10].
In the end, the simplest means of accounting for the continuous emission observed in the K-corona, the absence of overlying Fraunhofer lines, and the presence of sharp emission lines in this same region of the solar atmosphere, is to invoke a condensed matter model of the Sun [18-20].
At the same time, the Fraunhofer lines are not visible because insufficient levels of gaseous atoms are present in the K-corona to significantly absorb coronal radiation.

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