- #Jj thomson cathode ray experiment led to the discovery of archive#
- #Jj thomson cathode ray experiment led to the discovery of series#
In the bottom right corner of this photographic plate are markings for the two isotopes of neon: neon-20 and neon-22.
#Jj thomson cathode ray experiment led to the discovery of series#
Thomson conducted a series of experiments with cathode ray tubes which led him to the discovery of electrons and subatomic particles. He died in 1940 and was buried in Westminster Abbey, close to Sir Isaac Newton. In 1918 he became Master of Trinity College, Cambridge, where he remained until his death. In 1914 he gave the Romanes Lecture in Oxford on "The atomic theory". He was knighted in 1908 and appointed to the Order of Merit in 1912. His son became a noted physicist in his own right, winning the Nobel Prize himself for discovering the wave-like properties of electrons.įor his discovery of the electron, he was awarded a Nobel Prize in 1906. He fathered one son, George Paget Thomson, and one daughter, Joan Paget Thomson, with her. In 1890 he married Rose Elisabeth Paget, daughter of Sir George Edward Paget, KCB, a physician and then Regius Professor of Physic at Cambridge. One of his students was Ernest Rutherford, who would later succeed him in the post. In 1884 he became Cavendish Professor of Physics. He studied engineering at Owens College, Manchester, and moved on to Trinity College, Cambridge. Joseph John Thomson was born in 1856 in Cheetham Hill, Manchester in England, of Scottish parentage. Thomson is credited for the discovery of the electron, of isotopes and the invention of the mass spectrometer. Sir Joseph John Thomson, OM, FRS ( 18 December 1856 – 30 August 1940) often known as J. Note that he is the father of George Paget Thomson. Related subjects: British History Post 1900 Engineers and inventors J.J. Thomson an experimental genius?’ ( 1986) Google Scholar, submitted to Social Studies in Science.2007 Schools Wikipedia Selection. CrossRef Google Scholar In my thesis and a forthcoming paper, I discuss other ways in which the mechanical philosophy influenced Thomson's approach to experiment: Falconer, I., ‘J. As Wheaton has pointed out, the mechanical philosophy was implicit in Thomson and Schuster's cathode ray experiments: they assumed that macroscopic mechanical laws carried over into the microscopic realm: Wheaton, B., The Tiger and the Shark, Cambridge, 1983, p. He does not consider any experimental stimulus for the theory changes he describes, nor the influence of these theoretical commitments on Thomson's experimental work. However, Topper deals exclusively with Thomson's theoretical work. Google Scholar The last of these is particularly important for containing details of Thomson's vortex analogies and the way he transposed them from one situation to another. Thomson and the mechanical picture of nature’, Annals of Science, ( 1980), 37, p. 393 Google Scholar ‘To reason by means of images: J.
#Jj thomson cathode ray experiment led to the discovery of archive#
71–19065 ‘Commitment to mechanism: J.J.Thomson, the early years’, Archive for the History of Exact Sciences, ( 1971), 7, p. Thomson and Maxwell's Electromagnetic Theory’, Ph.D dissertation, Case Western Reserve University, 1970 Google Scholar, University Microfilms order No. CrossRef Google Scholar Topper has studied Thomson's commitment to mechanism in general, and to Maxwell in particular, in his thesis and two papers: Topper, D., ‘J. J., ‘ Mechanical explanation at the end of the nineteenth century’, Centaurus, ( 1972), 17, p. (20).ĥ5 Klein examines the status of the mechanical philosophy and visualisable analogies, particularly Maxwell's use of them: Klein, M. 510 Google Scholar ‘The disruptive discharge of electricity through gases’, Philosophical Magazine, ( 1890), V, 29, p. 371 Google Scholar ‘The passage of electricity through gases’, British Association Report, ( 1889), p. 317, 495 CrossRef Google Scholar ‘Experiments on the discharge of electricity through gases’, Proceedings of the Royal Society, ( 1887), 42, p.
Schuster, A., ‘ Experiments on the discharge of electricity through gases: a sketch of a theory’ (Royal Society Bakerian Lecture), Proceedings of the Royal Society, ( 1884), 37, pp. At the relatively high pressures of Thomson's experiments, cathode rays were not a significant phenomenon, but they probably were in Schuster's experiments. Neither quotes figures for the pressures they were working at, but Schuster appears to have expended more time in evacuating his apparatus. 34 This difference between Schuster and Thomson was probably largely due to the conditions under which they performed their experiments.