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Fluorescent lamp
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====Fluorescence==== The [[fluorescence]] of certain rocks and other substances had been observed for hundreds of years before its nature was understood. One of the first to explain it was Irish scientist [[Sir George Stokes, 1st Baronet|Sir George Stokes]] from the [[University of Cambridge]] in 1852, who named the phenomenon "fluorescence" after [[fluorite]], a mineral many of whose samples glow strongly because of impurities.
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