Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 371
Fig.257 explains this. Thedotted lines representthe real position of thesubmerged part of thestick, and dotted linesdiverging from a pointat the bottom of thestick show the courseof the rays which reachthe eye from that point. On reaching the surface they arebent from the perpendicular, and the… … Fig. 257. CRITICAL ANGLE. 353 water in which the bottom is visible. To an eye underwater the surface must appear at least | of its real dis-tance. 312. Critical angle; total reflection.—Let S S (Fig. 258)represent the boundary surface between two mediums, andA 0 and B 0 incident rays in the more…
Physics
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