"1841Z"^^ . "Victor Schumann"@en . . "1841-12-21Z"^^ . "Schumann, Victor"@en . "1913-09-01Z"^^ . . . . . . "Victor Schumann (December 21, 1841 \u2013 September 1, 1913) was a physicist and spectroscopist who in 1893 discovered the vacuum ultraviolet.Schumann wished to study the \"Extreme Ultraviolet\" region. For this, he used a prism and lenses in fluorite instead of quartz 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."@en . . "German spectroscopist" . "1913Z"^^ .