First slide

Stationary waves

Question

The frequency of fundamental tone in an open organ pipe of length 0.48 m is 320 Hz. Speed of sound is 320 m/sec. Frequency of fundamental tone in closed organ pipe will be

Easy

A

153.8 Hz
B

160.0 Hz
C

320.0 Hz
D

143.2 Hz

Solution

$n_{Closed} = \frac{1}{2} (n_{Open}) = \frac{1}{2} \times 320 = 160 Hz$

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