Question

A sound wave having a wavelength of 2 cm is travelling in water. If the velocity of sound in water is $1600m{s}^{-1}$, find the frequency of the sound wave.

• A. True
• B. False
• C. 7000 Hz
• D. 16000 Hz

Answer 1

The correct option is B

False

Given,

Wavelength ($\lambda$) = 2 cm = $0.02m$
Speed (v) = $1600m{s}^{-1}$

We know that $v=f\lambda$

Hence, $f=\frac{v}{\lambda }\Rightarrow f=\frac{1600}{0.02}\Rightarrow f=80000Hz$

Hence, the frequency of the sound wave is 80000 Hz