Fraunhofer Lines Puzzle for Sale by Science Source
James Bridle / Fraunhofer Lines
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In 1802, William Hyde Wollaston observed dark lines in the Sun's spectrum. Joseph von Fraunhofer, for whom the lines are named, plotted more than 500 of these lines beginning in 1814. The brightest are denoted by the letters A through G; these dark lines ...
This picture of Fraunhofer lines is taken from an original work by Fraunhofer himself. The lines appear as narrow dark stripes on the variously colored background of a continuous spectrum. The upper