Wavelengths for a standing sound wave in a closed pipe (13-21)

Question 1 of 2

Question

Wavelength of a standing wave in the pipe

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Review

Figures 13-18b and 13-18c show the next two standing wave modes of a closed pipe, and Figure 13-19 shows the displacement patterns extended outside the pipe. You can see that three quarters (3/4) and five quarters (5/4) of a wavelength, respectively, fit into the pipe for these modes. You can also see that the general relationship between $L$ and $\lambda$ for a closed pipe is