Fraunhofer Lines Definition
frounhōfər
noun
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.
American Heritage
The dark lines visible in the spectrum of the sun or a star.
Webster's New World
Origin of Fraunhofer Lines
After Joseph von Fraunhofer (1787–1826), German physicist
From American Heritage Dictionary of the English Language, 5th Edition
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