Sound : an elementary text-book for schools and colleges (1913)
Capstick, John Walton, 1858- · leaf 45
ect-angle, it must be regarded as touching each of the adjacentsides once, and when it has a side of the rectangle as atangent, it must be regarded as touching that side twice. 46. Optical method of compounding SimpleHarmonic Vibrations. Lissajous Figures can be producedoptically by means of two… … Pig. 17 strikes the mirror on the prong of the vertical fork, is reflectedto the prong of the horizontal fork, and thence to a screen Cwhere it is brought to a focus by the lens L. If the fork Aalone is vibrating, the spot on the screen describes harmonicvibrations so rapidly that only a bright…
Sound
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