Physics – Speed of sound experiment using standing waves.
Speed of sound experiment using standing waves.
Please watch the following:
In the video the instructor will use properties of sound waves to determine the speed of sound. This is done by using the properties of waves that allow standing waves to form.
A known frequency transverse sound wave is projected down a closed column and reaches column end. The sound wave is reflected along the column opposite in direction to that of the incident wave. The two waves combine so that there is no propagation of energy along the wave. The wave displacements are constant and remain fixed in location. This is called a standing wave because the two waves of equal amplitude and wavelength do not appear to be traveling. Standing waves are formed in strings of musical instruments and in the air in an organ pipe, a flute, and other wind instruments. Standing waves can then be produced in a column of proper length.
In this experiment the length of the column is controlled by water contained in the tube. The length is adjusted to allow standing waves to occur for different harmonics of the fundamental frequency.
Ewen, Dale; Neill Schurter, P. Erik Gundersen. Applied Physics (10th Edition) (Page 425-431). Pearson HE, Inc. Kindle Edition.
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List possible error sources
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