Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 549
480. Reflection and Refraction.—Suppose that AB (Fig.357) represents the smooth interface between two media ofdifferent density, the denser one being below. By a smoothsurface is meant one in which the roughnesses are small 538 WAVES. … compared to the wave-lengths. Thus, a masonry wall wouldbe smooth in this sense to long sea waves, or ordinary soundwaves, but to such short waves as produce the sensation ofvision, only the most highly polished surfaces can properlybe called smooth. Suppose, also, that M and op are the fronts of a…
Physics
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