Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 347
Fio. 393.—Waves going out from P aremade more curved by the lens, andappear to have P as their centre. These results are further illus-trated in a striking and beautifulmanner by using an air lens inan atmosphere of water. Such a lens can be constructed withoutdifficulty by cementing two… … FiQ. 394.—A concave air lens in anatmosphere of water convergesthe light. or ebonite rim. In Fig. 394 is .shown a double-concave len.s 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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