Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 104
e earth. Conse- ■^ quently, a ray of Ught isbent more and more as itproceeds down throughthe air. Let I, Fig. 22,represent a ray of hghtcoming from a star S toan observer at 0. Thestar is really in the direc-tion OS, but it appears to be in the direction OS fromwhich the light comes when it strikes… … Fig. 22. — Refraction of light by theearths atmosphere.
Astronomy
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