Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 282
then a minimum when BA and BA are equal, or when the incident and emergent rays make equal angles with the normals at the two surfaces of the prism. 196. Refraction at Spherical Surfaces (T., 1O7 ; P.,84). —Let 0 (Fig. 133) be the centre of curvature of thespherical surfaceAB of the densermedium.… … 272 LIGHT. Then since UPO is the angle of incidence and VPOthe angle of refraction, sin i_sin UPO= UU ^ VV = UU< PV_sin r~ sin VPQ~ PU * PV VV* PTJ ** But from the figure — —— . Substituting, OU PV OU AV , .= ;TT>. -r-pri when P is very near ^4. If we use the same notation as in Art. 181,…
Physics
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