Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 227
Hypothetical Lens. This idea is illustrated by Fig. 203, in which is shown ahypothetical lens formed of prisms of different angles. Rays of light proceeding from the point, S, to the lensare refracted differently, those meeting the outer portion ofthe lens being more deflected than those passing… … 3^ 4^_A5t Forms of Lenses. are not refracted. The emergent rays converge to thepoint, S. Where there is an infinite number of inclined sur-faces, the lens will have sphericall}- convex surfaces. Of converging or magnifying lenses there are four forms,three of which ,are shown at i 2, 3, in Fig.…
Physics · Lantern projection · Electric apparatus and appliances
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