Fraun·ho·fer lines (froun h  f r)pl.n. A set of several hundred dark lines appearing against the bright background of the continuous solar spectrum and produced by absorption of light by the cooler gases in the sun's outer atmosphere at frequencies corresponding to the atomic transition frequencies of these gases. [After Joseph von Fraunhofer (1787-1826), German physicist.] |
Fraunhofer lines (German) [ˈfraunhoːfər]
pl n
(Life Sciences & Allied Applications / Anatomy) a set of dark lines appearing in the continuous emission spectrum of the sun. It is caused by the absorption of light of certain wavelengths coming from the hotter region of the sun by elements in the cooler outer atmosphere
[named after J. von Fraunhofer (1787-1826), German physicist]
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