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 614
let A, in either diagram, be a point source of lightsif uated on the principal axis. A ray such as AB will, on enteringthe glass, be refracted along BD. In Fig. 538 (a) we have sin ABE _ sin i sinCBD sin r ~ ^and in Fig. 538 (b) we have sin ABC sin i sin EBD sin / ,/*■ JLVI SPHERICAL REFRACTING… … FIG. 538.—Spherical refracting surface. It must be remembered that in Fig. 538 (a), rx is essentiallylegative, in accordance with the convention of signs. Again, wheni and r are small, we may, without sensible error, write sin % _ % _sin r r or Hence, BP u or BP H1 u I1 BP v -1 i = fxr.BPN This…
Physics
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