First slide

Speed of wave

Question

The speed of a wave in a certain medium is 960 m/s. If 3600 waves pass over a certain point of the medium in 1 min, the wavelength is

Easy

A

2m
B

4m
C

8m
D

16m

Solution

$v = 960 m / s$ , $n = \frac{3600}{60} H z$ . So $λ = \frac{v}{n} = \frac{960}{60} = 16 m$

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