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A 20.0-cm long pipe is covered at one end in order to create a closed-end air column. A vibrating tuning fork is held near its open end, forcing the air to vibrate in its first harmonic. The wavelength of the standing wave pattern is ____.

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Answer:

80 cm

Explanation:

the given condition is closed-end air column. The wavelength is four times the length of the air column for the standing wave pattern for the first harmonic.  

The required wavelength of the standing wave pattern is

=[tex]\lambda =4L\\\lambda=4 \times 20\\\lambda=80 cm[/tex]

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