J. J. Thomson - Wikipedia, the free encyclopedia
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Sir Joseph John “J. J.” Thomson , OM, FRS (18 December 1856 – 30 August 1940) was a British physicist and Nobel laureate, credited for the discovery of the electron and of isotopes, and the invention...
en.wikipedia.org/wiki/J._J._Thomson
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of an 1895 experiment by Jean Perrin, Thomson built a cathode ray tube ending in a pair of metal cylinders with a slit in them. These cylinders were in turn connected to an electrometer, a device for catching and measuring electrical charge.
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www.aip.org/history/electron/jj1897.htm
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; A simple cathode ray tube. ... Yet Thomson's bold suggestion that cathode rays were material constituents of atoms turned out to be correct. The rays are made up of electrons: very small, negatively charged particles that are indeed fundamental parts of every atom.
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www.aip.org/history/electron/jjhome.htm
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In 1897, J. J. Thomson was refining experiments that dealt with the glowing paths revealed when currents of electricity provided by high voltage sources passed through evacuated glass tubes. ... Scientists had discovered as early as the 1850's that when a magnet was held up next to the cathode ray tube, the beam would...
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dev.physicslab.org/Document.aspx?doctype=3&filename=Mag...
dev.physicslab.org/Document.aspx?doctype=3&filename=Magnetism_CathodeRays.xml
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How does a cathode ray tube work? Roll the mouse over the labels see a description of that part. ... Click on the small picture to view the video. The file will open in a new browser window. ... close-up, cathode ray tube showing electron beam...
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www.chem.uiuc.edu/clcwebsite/cathode.html
www.chem.uiuc.edu/clcwebsite/cathode.html
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dwb4.unl.edu/chemAnime/CATHRAYD/CATHRAYD.html
dwb4.unl.edu/chemAnime/CATHRAYD/CATHRAYD.html
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This experiment proves that something charged with negative electricity is shot off from the cathode, ... 1) with slits in them are placed in a bulb connected with the discharge-tube; the cathode rays from the cathode A pass into the bulb through a slit in a metal plug fitted into the neck of the tube; this plug is...
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webserver.lemoyne.edu/faculty/giunta/thomson1897.html
webserver.lemoyne.edu/faculty/giunta/thomson1897.html
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He found charge to mass ratio with his experiment.
http://wiki.answers.com/Q/What_did_JJ_Thomson's_cathode...
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J.J. Thomson's Cathode Ray Tube ... The image (23K GIF) below is of J.J. Thomson and a cathode ray tube from around 1897, the year he announced the discovery of the electron. Only the end of the CRT can be seen to the right-hand side of the picture.
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www.chemteam.info/AtomicStructure/Disc-of-Electron-Imag...
www.chemteam.info/AtomicStructure/Disc-of-Electron-Images.html
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