William Crookes

✶June 17, 1832

†April 4, 1919

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About their life

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, 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 foundational contribution to plasma physics.

British chemist and physicist (1832-1919)

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Biography from the article William Crookes on the English Wikipedia, available under CC BY-SA 4.0.