sum_lecture10 - T he Physics of L ight & Sound Standing...

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The Physics of Standing Waves & Overtones Drs. Paulson and Scully
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Reflection of Waves The string pulls upward on the end of the string. The end can’t move so according to Newton's third law, the wall must be exerting an equal downward force on the end of the string. This creates a wave pulse that propagates from right to left, with the same speed and amplitude as the incident wave but upside down.
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Reflection of Waves The net vertical force at the free end must be zero. This requires that the slope of the string displacement be zero at the free end. The reflected wave pulse propagates from right to left, with the same speed and amplitude as the incident wave, and right-side up.
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A standing wave can be produced in a system where the ends reflect a wave. It is a pattern resulting from the presence of two waves of the same frequency with different directions of travel within the same medium. A
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This note was uploaded on 06/02/2011 for the course GSCI 121 taught by Professor Niculescu,m during the Spring '08 term at James Madison University.

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sum_lecture10 - T he Physics of L ight & Sound Standing...

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