Preston, Thomas, Joly, Charles Jasper, 1864-1906, Parsons, John Herbert, Sir, 1868-1957, donor, University College, London. Library Services · London : Macmillan and Co. · leaf 465
is easy to show that the effect of introducing a relative retardation between the circular vibrations is to rotate the plane of polarisation. Thus if two particles M and M' (Fig 200) describe the same circle in opposite directions starting from the same point Y, it is clear that their velocities… … Fig. 200. Fig. 201. molecule its velocity parallel to OY, at any instant, will be double that of M or M', and its velocity perpendicular to OY will be zero, so that ^ The same results follow with ordinary light. In fact, the experiment was first devised to show the double refraction of unpolarised…
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