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Sir Joseph John Thomson (18 December 1856 – 30 August 1940) was an English physicist who received the Nobel Prize in Physics in 1906 for his discovery of the electron, the first subatomic particle to be found.
By 1890, J.J. Thomson had his own version called the "nebular atom" hypothesis, in which atoms were composed of immaterial vortices and suggested similarities between the arrangement of vortices and periodic regularity found among the chemical elements. [6] Thomson's discovery of the electron in 1897 changed his views.
Thomson experiment: J. J. Thomson: Discovery Electron: 1901 Trouton–Noble experiment: Frederick Thomas Trouton and H. R. Noble. Negative result Luminiferous aether: 1905 Rubens tube: Heinrich Rubens: Demonstration Standing wave: 1908 Geiger–Marsden experiments: Hans Geiger, Ernest Marsden, Ernest Rutherford: Discovery Atomic nucleus: 1909 ...
Discovery of the ultraviolet radiation below 200 nm, named vacuum ultraviolet (later identified as photons) because it is strongly absorbed by air, by the German physicist Victor Schumann [2] 1895 X-ray produced by Wilhelm Röntgen (later identified as photons) [3] 1897 Electron discovered by J. J. Thomson [4] 1899
Discovered: J. J. Thomson ... synchrotron radiation was discovered with a 70 MeV electron ... primarily because the delocalized electrons are free to transport ...
Sir Joseph John Thomson, OM, FRS (18 December 1856 – 30 August 1940) often known as J. J. Thomson, was an English physicist.Thomson is credited for the discovery of the electron, of isotopes, and the invention of the mass spectrometer.
[3] [4] In it, Thomson developed a mathematical treatment of the motions of William Thomson and Peter Tait's atoms. [5] When Thomson later discovered the electron (for which he received a Nobel Prize), he abandoned his "nebular atom" hypothesis based on the vortex atomic theory, in favour of his plum pudding model.
The electron was discovered between 1879 and 1897 in works of William Crookes, Arthur Schuster, J. J. Thomson, and other physicists; its charge was carefully measured by Robert Andrews Millikan and Harvey Fletcher in their oil drop experiment of 1909.