A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 605
above it,the whole beam is reflected, noneof it emerging. The angle ofincidence at which this pheno-menon first occurs is called thecritical angle, and the beam is saidto be totally reflected. Thus, in Fig. 528 the ray ABemerges in part along BC, someThe ray EB gives rise to a very feebleemergent… … Fig. 528.—Internal reflection. being reflected along BD angle of refraction is 90 sin EBQ = ll and since <in 90° sin 90° - 1 ;1 sine dl critical angle = Ex it. 12G.—Total reflection by a glass prism.I Mace a glass prism upright upon a piece ofdrawing paper-, and draw in its outline ABC(Fig.…
Physics
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