Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 370
light, inFig. 259. passing from one medium to another, varies with the me-dium and with the angle ofincidence. It diminishes asthe angle of incidence dimin-ishes, and is zero when theincident ray is normal (i.e.,perpendicular to the surfaceof the medium). It is highlyimportant, knowing the angleof… … 848 RADIANT ENERGY. — LIGHT. 10; through the same point draw IH perpendicular to thesurfaces of the two media, and to this line drop perpendicularsBD and CE from the points where the circle cuts the ray in thetwo media. Then suppose that the perpendicular B D is -^\ ofthe radius A B ; now this…
Physics
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