May 19, 2010
Identify the phenomenon in 1, which is named after the dude who invented the device at the center in 2 (he is present in 2)
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Fraunhofer invented the spectroscope, and discovered 574 dark lines appearing in the solar spectrum. These were later shown to be atomic absorption lines, as explained by Kirchhoff and Bunsen in 1859. These lines are still called Fraunhofer lines in his honour.