Laurence, Lionel · London, School of Optics · leaf 109
Fig. 100. Or D, the power of a lens, is equal to the sum of the two conjugatesf\ an(i/^ expressed in diopters as dx and d2. … Fig. 107. Let/X be 100 cm. (Fig. 106). The lens has a converging power of 5 D, andthe light has a divergence of 1 D. Consequently, after refraction, the lighthas a convergence of 5 - 1 =4 D, the I being at 25 cm. 98 GENEEAL AND PKACTICAL OPTICS In Fig. 107 the + 5 D is shown as if split into two…
Optics
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