Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 338
graduallydiminishes, and hence a ray of light on passing from one layer to another must gradually cliangeits direction. Let the observer be at A (Fig. 375), and let AZ be the Fia. 374.—The fountain of fire. Thefalling water seems to be on fire. … Fig. 375. — Showing how the atmospherechanges the apparent position of a heavenlybody. 328 REFRACTION direction of the plumb-line. Z is then the observeis zenith.Tiie plane through A, at right angles to AZ, is the horizon. Astar at Z will appear in its proper direction since the lightfrom it…
Physics
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