Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 360
indefinitely small, and the thick-ness of the lens neglected ; next, the correction for thickness willbe introduced, and, lastly, under the title of Aberration of Lenses,the case of a pencil of any magnitude will be considered. Refrac-tion through spheres and parallel plane surfaces, will be… … Let E be the radiant point of a small pencil, of which UP isthe axis, and ER the extreme ray; the ray ER, passing into thedenser medium, will be refracted towards the perpendicular, CR,making the angle mRM less than ERC, and in such a proportionthat sin ERC : sin mRM :: m : 1, m representing the…
Optics
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