Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers (1900)
Prentice, Charles Frederick, b. 1854 · Philadelphia : Keystone · leaf 19
edray, e^ e^ ;* and the refracted ray after exit, the final ray, f. * The ms€ of superior Indices wiU not prove conflicting as algebraic ralues are excluded. 13 14 EEFEACTION. § 2. Eefraction manifests itself by an acute bend in the direction of anoblique ray of light, i, at the point of incidence,… … Fig. 1. By virtue of the deflection or bend alluded to, the incident ray, i, mustinclude a different angle, a, with the perpendicular p^ from that, ^, of therefracted ray e^ e^; and it is by the trigonometrical values s and s^ of theseangles, which have been found to bear a constant proportion to…
Lenses
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