The Physical Properties of Colloidal Solutions

The Physical Properties of Colloidal Solutions

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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. 1921 edition. Excerpt: ...disturbance, and it only remains to see what the effect of such forces would be. In the first place there is necessarily a complete symmetry around the direction of the force; the disturbance, consisting of transverse vibrations, is propagated outwards in all directions from the centre; and in consequence of the symmetry the direction of the vibration in any ray lies in the plane containing the ray and the axis of symmetry; that is to say, the direction of vibration in the scattered or refracted ray makes with the direction in the incident or primary ray the least possible angle. The symmetry also requires that the intensity of the scattered light should vanish for the ray which would be propagated along the axis. For there is nothing to distinguish one direction transverse to the ray from another. Suppose for distinctness of statement that the primary ray is vertical, and that the plane of vibration is that of the meridian. The intensity of the light scattered by a small particle is constant, and a maximum for rays lying in the vertical plane running east and west, while there is no scattered ray along the north and south line. If the primary ray is unpolarized, the light scattered north and south is entirely due to that component which vibrates east and west, and is therefore perfectly polarized, the direction of its vibration being east and west. Similarly any other ray scattered horizontally is perfectly polarized, and the vibration is performed in the horizontal plane. In other directions the polarization becomes less and less complete as we approach the vertical." As a result of the analysis, Rayleigh shows that the intensity ls of the scattered light varies according to the following law: --T (D'-D)2,0.-.7rT2 I. oo I.v D2;(1 more

Product details

  • Paperback | 64 pages
  • 189 x 246 x 3mm | 132g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236603079
  • 9781236603074