Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 81
nd,the process being repeated by every subsequent advanceand retreat. The whole function of the tuning-fork is tocarve the air into these condensations and rarefactions,and they, as they are formed, propagate themselves insuccession through the air. A condensation 9rith itsassociated rarefaction… … tions. The condensation of the sound-wave correspondsto the crest, while the rarefaction of the sound-wave corre-sponds to the sinus, or depression, of the water-wave.Let the dark spaces, a, 6, c, d, fig. 25, represent the con-densations, and the light ones, a% 6, c, d\ the rarefac-tions of the…
Sound
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