Elements of physics for medical students / by Frederic James M. Page.

  • Page, Frederic James M.
Date:
1907
Catalogue details

Licence: In copyright

Credit: Elements of physics for medical students / by Frederic James M. Page. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    [Part VI. that L II G are in line. Remove the pri.sm, produce I G to K, cutting the prism at d, and produce L h to M, cutting the prism at E. The incident ray strikes the prism at d, is refracted along d e, and emerges in the direction e l. K M L is the angle of deviation. Fig. 228.—Path of totally reflected ray. G. Trace the path of a totally reflected ray through a prism (Fig. 228). Trace the base, a b c, of the prism with a pencil. ]n.sert pins d and E at equal distances from B. Look along f d for the reflected image of e. Insert pin F so that F D e are in line. In a similar way insert pin at g, so that g E d are in line. Join F D, produce to K, produce g E to p'; from p' drop a [)erpendicular to a c, p f' ; make f'm = f m, and join f k, then k h f' is the path of the ray through the prism. It will be noticed that the ray, totally reflected, is without colour, while the refracted ray is surrounded by a fringe of colours.