Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 347
336 LENSES. … Fig. 394.—A concave air lens in anatmosphere of water convergesthe light. or ebonite rim. In Fig. 394 is shown a double-concave lens immersed in water contained in a tank withplate-glass sides. Plane waves from a lantern passinto the water, and on entering thelens the outer portions, since…
Physics
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