Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 206
xample,appears in the direction of the last portion of the raywhich reaches the observer at 0. So the heavenly bodiesare always seen a little above their true position, exceptwhen in the zenith. The body S appears at S, Fig. 222,and A which is below the horizon appears coming intoview at A. 689.… … MIKAGE. 197 the surface of the refracting medium, before the angle ofincidence. The ray of light then moves parallel to thatsurface, as c 0 c, Fig. 223. The angle of incidence at whichthis occurs is the Critical Angle. From water to air it is48° 35. The angle of incidence can still increase, and by…
Physics
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