Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 38
. Fig. 14 shows that if a radiant be placed beyond the principal THE FOCI 01- LENSES 13 focus of a converging lens, the rays are brought to a focus beyondthe principal focus on the other side of the lens. The nearer theradiant is to the principal focus, the farther away will be its… … Fig. 11.—Biconvex, plano-convex, Fig. 12.—Biconcave, plano-concave, and converging meniscus lenses. and diverging meniscus lenses. (From the Forces of Nature.) (From the Forces of Nature.) the focal distances of which can always be calculated, are known asconjugate foci. Should the radiant be at a…
Microscopy
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