Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 367
ok for a rainbow in the evening ? At Avhat timecan one see the longest bow ? Under what circumstances covdd one seetlie bow as a complete circle ? 4. An achromatic lens is composed of a converging lens of focal length10 cm. and a diverging lens of focal length 15 cm. What is the focallengtli of the… … ChoroiOpticNerveM Sclerotic Fio. 423.—Horizontal section of a righteye. ^./i., aciueous humour ; 1.,?.,yellow spot; B.S., blind spot. 407. The Eye. The mo.st important as well as the mostwonderful of optical instruments is the human eye. In form it isCornea almost spherical (Fig. 423). The horny…
Physics
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