Conduction of Electricity Through Gases

Conduction of Electricity Through Gases

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...radiation completely. Thickness of paper = 0027 cm. The intensity of the radiation, which is proportional to the rate of discharge, thus diminishes in approximately geometrical progression with the addition of equal thicknesses of paper, this shows that the radiation is roughly homogeneous. When however a thick layer of the oxide is used there is in addition to the radiation of the type given out by the thin layer other radiation of a much more penetrating type; this is proved by the following results, which were also given by Rutherford. Becquerel, Comptes Rendus, czxxiii. p. 977, 1901. + Schmidt, Wied. Ann. lxv. p. 141, 1898. t Rutherford, Phil. Mag. v. 49, pp. 1, 161, 1900. Owens, Phil. Mag. v. 48, p. 360, 1899. Thick layer of oxide. Thickness of paper = 008 cm. Thus the first layer of paper produces an appreciable diminution in the intensity of the radiation due to the absorption of the radiation of the type given out by the thin layer, but after this is absorbed there is an appreciable amount of radiation left which can pass through a considerable thickness of paper without suffering much absorption. 147. The radiation from thick layers of thorium oxide when first measured by Rutherford seemed to be extremely capricious; thus, for example, when its intensity was measured by the conductivity it communicated to a gas, the slightest draught in the vessel through which the current of electricity passed was sufficient to produce a very sensible diminution in the current; indeed so sensitive was the current to external disturbances, that it was found exceedingly difficult to get consistent results. Rutherford showed that those irregularities had a most interesting cause, as he was able to trace them to an 'emanation' given off by the...
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Product details

  • Paperback | 168 pages
  • 189 x 246 x 9mm | 313g
  • United States
  • English
  • black & white illustrations
  • 1236494164
  • 9781236494160