J. J. Thomson AKA Joseph John Thomson Born: 18-Dec-1856 Birthplace: Cheetham Hill, England Died: 30-Aug-1940 Location of death: Cambridge, Cambridgeshire, England Cause of death: unspecified Remains: Buried, Westminster Abbey, London, England
Gender: Male Religion: Anglican/Episcopalian Race or Ethnicity: White Sexual orientation: Straight Occupation: Physicist Nationality: England Executive summary: Discovered the electron Beginning in 1895 physicist J. J. Thomson theorized that cathode rays produced in Crookes' tubes must be composed of what he called "corpuscles", a single type of negatively charged particle. In 1897, applying his own vacuum technique to the study of these then-mysterious rays, Thomson made a convincing argument for composition based on sub-atomic particles, "this matter being the substance from which all the chemical elements are built up".
To make sense of this theory he proposed a "plum pudding model" of the atom, which was debated for several years and disproved by his former student, Ernest Rutherford. Thomson also showed a stream of channel rays could be separated into two or more parts through exposure to electrical and magnetic fields, leading eventually to the invention of the mass spectrograph and discovery of isotopes by another of Thomson's students, Francis W. Aston. Thomson won the Nobel Prize in Physics in 1906, and his son, physicist George Paget Thomson, won the same honor in 1937. Father: Joseph James Thomson (bookseller, d. 1872) Mother: Emma Thomson Wife: Rose Elizabeth Paget (lab student, m. 22-Jan-1890, one son, one daughter) Son: George Paget Thomson (physicist) Daughter: Joan Paget Thomson
University: Victoria University of Manchester University: BA Mathematics, Trinity College, Cambridge University (1880) Fellow: Trinity College, Cambridge University (1880-1918) Professor: Cavendish Professor of Physics, Cambridge University (1884-1919) Lecturer: Physics, Princeton University (1896, four lectures) Lecturer: Physics, Yale University (1904, six lectures) Administrator: Master, Trinity College, Cambridge University (1918-40)
Cambridge and St John's Adams Prize 1884
Royal Medal 1894 Hughes Medal 1902 Smithsonian Hodgkins Medal 1902
Nobel Prize for Physics 1906 Knighthood 1908 Order of Merit 1912 Copley Medal 1914 John Scott Medal 1923
Benjamin Franklin Medal 1923 (by the Franklin Institute) Mascart Medal of the Societe Francaise des Electriciens 1927
Manchester John Dalton Medal 1931
IET Faraday Medal 1938
British Association for the Advancement of Science President (1909)
Royal Institution of Great Britain Royal Society 1884 Royal Society President (1916-20) Scottish Ancestry
Author of books:
Elements of the Mathematical Theory of Electricity and Magnetism (1895, physics) Properties of Matter (1895, physics text; with J. H. Poynting) Discharge of Electricity through Gases (1897, physics) Conduction of Electricity through Gases (1903, physics) The Structure of Light (1907, physics) The Corpuscular Theory of Matter (1907, physics) Rays of Positive Electricity (1913, physics) The Electron in Chemistry (1923, physics) Recollections and Reflections (1936, memoir)
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