William Crookes

Sir William Crookes, OM , FRS (June 17 1832 – April 4 1919) was an English chemist and physicist.

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Sir William attended Royal College of Chemistry in London. Working on spectroscopy, in 1861 he discovered a previously unknown element with a bright green emission line in its spectrum. He named the element thallium, from the Greek thallos, a green shoot. Crookes also identified the first known sample of helium, in 1895.

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He was the inventor of the Crookes radiometer, which today is made and sold as a novelty item. He also developed the Crookes tubes, investigating canal rays.

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In his investigations of the conduction of electricity in low pressure gases, he discovered as the pressure was lowered, that the negative electrode appeared to emit rays (the so-called cathode rays, now known to be a stream of free electrons, and used in cathode ray display devices). He was one of the first scientists to investigate what are now called plasmas.

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OM: The word Om and similar words have these meanings:-...

FRS: FRS is an acronym which can stand for various phrases:...

June 17: June 17 is the 168th day of the year in the Gregorian calendar (169th in leap years), with 197 days remaining....

William Crookes related Images and Photos (experimental)

Sir William Crookes with the Purported Image of Lady Crookes	William Tell	William Wirt	William Kent
William Perry	William Lilly	William Smith	William Devane
William Conrad	William Bendix	William Shatner	William Shatner