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 599
ted ray, and the normalto the surface at the point of incidence,lie in one plane. Second law of refraction.—The ratio ofthe sine of the angle of incidence to thesine of the angle of refraction is a con-stant quantity for any two given media.In Fig. 520 let EF be the surface ofseparation, air being… … FIG. 520. Illustration of laws ofrefraction. LAWS OF REFRACTION 575 Then the second law of refraction states that sin AOB = a constant. sin COD This constant is called the index of refraction for the two media,find is usually represented by the Greek letter //. sin i Thus, sm r ■ ji. AB CD From…
Physics
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