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Elements of natural philosophy (Volume 2-3) . ), at the same time making Andm = suppose . , . these surfaces to , which is supposing the ray to pass into the bound a medium v immersed in first medium after having traversed the medium boundedanother;by the two deviating surfaces, that Equation reduces to, m / n r m{m — 1 . / + r)mrf + {f .m—1 + r) t Final relation for• (t)Jj a single lensretaining t. which gives a direct relation between the conjugate focaldistances in the case of light deviated by a single lens. APPLICATION OF THE PRECEDING THEORY TO THE DEVI-ATION OF LIGHT BY REFRACTION THROU
Elements of natural philosophy (Volume 2-3) . ), at the same time making Andm = suppose . , . these surfaces to , which is supposing the ray to pass into the bound a medium v immersed in first medium after having traversed the medium boundedanother;by the two deviating surfaces, that Equation reduces to, m / n r m{m — 1 . / + r)mrf + {f .m—1 + r) t Final relation for• (t)Jj a single lensretaining t. which gives a direct relation between the conjugate focaldistances in the case of light deviated by a single lens. APPLICATION OF THE PRECEDING THEORY TO THE DEVI-ATION OF LIGHT BY REFRACTION THROUGH THE VARI-OUS KINDS OF SPHERICAL LENSES. § 42. A lens has been defined to be, any medium Application ofbounded by curved surfaces, used for the purpose of*^^™*deviating light by refraction; the surfaces are generally various sphericalspherical. lenses. A) called a doubleconvex lens, is boundedby two spherical sur-faces, having their cen-tres and the surfacesto which they corres-pond, on opposite sidesof the lens. When the Fig. Geometricalrepresentationsof the sphericallenses. 202 NATURAL PHILOSOPHY. Double convexlens; Plano-convex;
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