First slide

Travelling wave

Question

The frequency of a tuning fork is 384 per second and velocity of sound in air is 352 m/s. How far the sound has traversed while fork completes 36 vibration

Moderate

A

3 m
B

13 m
C

23 m
D

33 m

Solution

$λ = \frac{v}{n} = \frac{352}{384}$ ; during 1 vibration of fork sound will travel $\frac{352}{384} m$ during 36 vibration of fork sound will travel $\frac{352}{384} \times 36 = 33 m$

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