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Victor Schumann
German spectroscopist (1841–1913) From Wikipedia, the free encyclopedia
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Victor Schumann (21 December 1841 – 1 September 1913) was a physicist and spectroscopist who in 1893 discovered the vacuum ultraviolet.
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Schumann studied the extreme ultraviolet region of the electromagnetic spectrum. For this, he used a prism and lenses in fluorite instead of quartz[1] allowing himself to be the first to measure spectra below 200 nm. Oxygen gas would absorb the radiation with a wavelength below 195 nm, but Schumann placed the entire apparatus under vacuum. He prepared his own photographic plates with a reduced layer of gelatin.
He published on the hydrogen line in the spectrum of Nova Aurigae and in the spectrum of vacuum tubes.[2]
His work opened the way to atomic emission spectroscopy, leading eventually to the discovery of the hydrogen spectral lines series (Lyman series) by Theodore Lyman in 1914.[1]
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