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Vintage illustration of Sound Waves #215028045
Description
The Children`s Encyclopedia by Arthur Mee 1940s.Vintage illustration of sound waves. If a needle is attached to a tuning-fork, and the fork is fixed in a block of wood and then struck, the vibrating needle will draw a wavy line on a slowly revolving cylinder. A vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
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