Handbook of optics for students of ophthalmology (1899)
Souter, William Norwood, 1961-1935 · New York, Macmillan · leaf 25
We shall sup-pose the rays to lie in a principal plane of the prism,that is, in a plane which is perpendicular to the edgeof the prism, and consequently to the plane of each REFRACTION AT PLANE SURFACES 15 face of the prism. We shall also confine our atten-tion to prisms whose refractive index is… … Fig. 5. bounded by parallel surfaces, emerges without devia-tion. Let PQRS (Fig. 5) represent a ray passingthrough the medium ABCD, AB and CD beingparallel. RN is normal to the face CD. Now sup-pose the face CD be turned into the position AD,making the prism BAD; then the normal RN mustturn into…
Eye · Lenses
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