: Astronomie: Fraunhofer line

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Fraunhofer line

In physics and optics, the Fraunhofer lines are a set of spectral absorption lines named after the German physicist Joseph von Fraunhofer (1787–1826). The lines were originally observed as dark features (absorption lines) in the optical spectrum of the Sun (white light) . (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Fraunhofer_lines)

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