First slide

Introduction to waves

Question

The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point, in the medium in 2 minutes, then its wavelength is

Easy

A

13.8 m
B

25.3 m
C

41.5 m
D

57.2 m

Solution

Frequency of wave is $n = \frac{3600}{2 \times 60} Hz \Rightarrow λ = \frac{v}{n} = \frac{760}{30} = 25 .3 m$

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