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Spectral Lines ~ Joseph Fraunhofer

Spectral Lines ~ Joseph Fraunhofer

Joseph Fraunhofer, (ennobled in 1824 as Ritter von Fraunhofer) was a German optician.He is known for the discovery of the dark absorption lines known as Fraunhofer lines in the Sun's spectrum, and for making excellent optical glass and achromatic telescope objectives.

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from a deficiency or excess of photons in a narrow frequency range,...

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