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The fundamental frequency is the lowest mode of vibration of a system. If you think of a taut string, the lowest mode with which it can vibrate is the one where the centre of the string travels the maximum distance up and down so the string forms a single arc. It is also possible for it to vibrate so that two arcs (one up and one down) fit into the string, and there are many more possibilities with higher frequencies. On a stringed instrument you can hear the fundamental frequency as the normal note which the string plays, and the others as overtones. Other systems exhibit the same phenomenon.

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8y ago
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12y ago

It is the normal mode of vibration with the lowest frequency.

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15y ago

It depends on the speed of the wave and the frequency. Lambda = wave speed / frequency.

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Q: What is a fundamental mode of vibration?
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