Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 255
e of these layers. It follows from this that thepath of a raj of light through the atmosphere is not astraight line like A C\ but a curve. We may supposethis curve to be represented in Fig. 72, where the num-ber of layers has been taken very small to avoid confusingthe drawing. Let C be the centre… … TIG. 72.—REFRACTION OF LAYERS OF AIR. enters the *;ye of an observer at A in the apparent direc-tion A S. He will then see the star in the direction £*instead of that of S, and S A ■&, the refraction, willthrow the star nearer to the zenith Z. The angle S A Z is the apparent zenith distance of…
Astronomy
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