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William Crookes
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Sir William Crookes was an English chemist and physicist who attended the Royal College of Chemistry, now part of Imperial College London, and worked on spectroscopy. He was a pioneer of vacuum tubes,
Crookes in 1906
Crookes in 1906
Blue plaque, 7 Kensington Park Gardens, London
Blue plaque, 7 Kensington Park Gardens, London
The element thallium, discovered by Crookes
The element thallium, discovered by Crookes
The mineral crookesite, a selenide of copper, thallium and silver (Cu 7(Tl, Ag)Se 4), named for Crookes
The mineral crookesite, a selenide of copper, thallium and silver (Cu 7(Tl, Ag)Se 4), named for Crookes
Crookes tube
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A Crookes tube is an early experimental discharge tube with partial vacuum invented by English physicist William Crookes and others around 1869–1875, in which cathode rays, streams of electrons, were
William Crookes
…attended the Royal College of Chemistry, now part of Imperial College London, and worked on spectroscopy. He was a pioneer of vacuum tubes, inventing the Crookes tube, which was made in 1875. Observing cathode rays generated in these tubes, Crookes posited that "radiant matter" was a unique fourth state of matter, a…
Experimental Crookes tube belonging to Wilhelm Röntgen, c. 1890, at Gedächtnisstätte Würzburg (Rontgen Memorial), Würzburg, Germany
Experimental Crookes tube belonging to Wilhelm Röntgen, c. 1890, at Gedächtnisstätte Würzburg (Rontgen Memorial), Würzburg, Germany
A Crookes tube: light and dark. Electrons (cathode rays) travel in straight lines from the cathode (left), as shown by the shadow cast by the metal Ma
A Crookes tube: light and dark. Electrons (cathode rays) travel in straight lines from the cathode (left), as shown by the shadow cast by the metal Maltese cross on the fluorescence of the righthand glass wall of the tube. The anode is the electrode at the bottom
William Crookes and his glowing tubes gained renown, as shown by this 1902 caricature in Vanity Fair. The caption read "ubi Crookes ibi lux", which in
William Crookes and his glowing tubes gained renown, as shown by this 1902 caricature in Vanity Fair. The caption read "ubi Crookes ibi lux", which in Latin means roughly, "Where there is Crookes, there is light"
Crookes X-ray tube from around 1910
Crookes X-ray tube from around 1910