Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers (1900)
Prentice, Charles Frederick, b. 1854 · Philadelphia : Keystone · leaf 23
en the formerimpinges upon a transparent medium included within obliquesurfaces, or c. The apex of the angle formed by an obliquity of the incident andfinal rays is always directed toward the apex of the angle ofobliquity of the surfaces. The law of refraction (2) finds its graphical demonstration… … Fig. 5. Prism, Base vertical; Refractionhorizontal. Fig. 6. Prism, Base horizontal; Refractionvertical. § 8. The Figures 5 and 6 are of particular interest to us, as they illustratea very vital element in our future consideration of the refraction by cylin-drical lenses, namely, that the refraction…
Lenses
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