It’s easy to calculate the frequency, period, wavelength and speed of waves at different harmonics.
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For a tight string, there’s a handy equation that we can use to relate the length of the string to the wavelength based on the harmonic number like this:

L = (n/2) λ

where L is the length of the string, and n is the harmonic number. Here’s how to use this equation to find everything we need about the wave:

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