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Apr 2, 2014 · Updated: May 26, 2021. Photo: Universal History Archive/Getty Images. (1856-1940) Who Was J.J. Thomson? J.J. Thomson attended Trinity College at Cambridge, where he would come to head the...
Nov 13, 2019 · On April 30, 1897, British physicist J.J. Thomson announced his discovery that atoms were made up of smaller components. This finding revolutionized the way scientists thought about...
- Missy Sullivan
Overview. Late in the nineteenth century physicists were working hard to understand the properties of electricity and the nature of matter. Both subjects were transformed by the experiments of J. J. Thomson, who in 1897 showed the existence of the charged particles that came to be known as electrons.
Thomson's discovery of the electron began in 1895 with a series of experiments in the Cavendish Laboratory. Influenced by the work of James Clerk Maxwell land the discovery of the X-ray, Thomson deduced that cathode rays (produced by Crookes tube) exhibited a single charge-to-mass ratio e m and must be composed of a single type of negatively ...
Feb 13, 2024 · February 13, 2024. Physicists Biographies. Sir Joseph John Thomson, often referred to as J. J. Thomson, occupies a monumental place in the pantheon of physics. Born in 1856 near Manchester, England, his humble beginnings belied the impact he would have on the scientific community.
Apr 25, 2024 · J.J. Thomson discovered the electron in 1897 and led the Cavendish Laboratory into a world-class research institution. His work opened the field of subatomic physics to experimental investigation and helped unravel the inner workings of the atom.
Thomson's claim to be the discoverer of the electron rests on two key observations. First, he found that the value of e/m was of the order of 1000 times larger than its value for the lightest particle then known, which was the hydrogen ion in electrolysis.
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