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4 March, 15:20

How do you calculate wavelength with distance? I know that it's 4L for the first harmonic of a closed end column but what is it for an open ended column or a column with one end open, one end closed? Why does it work like that?

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  1. 4 March, 17:57
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    For a closed end we have odd harmonics.

    fo, 3fo, 5fo, 7fo, 9fo, ... fo = V / wavelength. = V / 4L

    Wavelength = 4L.

    For a open end we have natural number harmonics.

    fo, 2fo, 3fo, 4fo, 5fo, ... fo = V / wavelength. = V / 2L

    Wavelength = 2L.
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