The book A Text book of Sound was written by author Edmund Catchpool Here you can read free online of A Text book of Sound book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text book of Sound a good or bad book?
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It then appears as a band of light toothed along its upper edge, the teeth being the images of the flame at the moments when it is highest. (A similar effect can be produced, without a rotating mirror, by rapidly turning the head from side to side while looking at the flame. ) If a number of such capsules are inserted in the side of an organ pipe, the flames of all of them flicker except of those at antinodes, and the positions of these are therefore easily seen. The methods previously given de...tect the nodes. The nodes of a rod in stationary undulation may be shown either by scattering sand on it or by putting a number of YIBKATIONS OF AIR IN PIPES. 153 -card or wire rings on the rod and holding it nearly, but not quite, horizontally. When the rod is set in resonant vibration, the rings slip down it till they reach a node. Any of the modes of resonant vibration of an air column may be imitated by means of the spiral wire of Art. 73. A short heavy pendulum, of adjustable length, must be suspended vertically over one end of the spiral, so that the bob of the pendulum hangs between the horizontal rods and on a level with them.
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