Tyndall, John, 1820-1893 · New York : Appleton · leaf 419
By the method of M. Lissajous we can combine therectangular vibrations of two tuning-forks, a subjectwhich I now wish to illustrate before you. In front oi Fie. 172. … in electric lamp, l, Fig. 172, is placed a large tuning-fork,t, fixed in a stand horizontally, and provided with a COMPOSITION OF SONOROUS VIBRATIONS. 411 mirror, on which a narrow beam of light, l t, is per-mitted to fall. The beam is thrown back, by reflection.In the path of the reflected, beam…
Sound
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