Question

A wave of wavelength $0.60\text{cm}$ is produced in air and it travels at a speed of $300\text{m/s}$. Will it be audible ?

• A. Yes
• B. No
• C. May be
• D. Data insufficent

Answer 1

The correct option is B No

From the relation $v=\nu \lambda$, the frequency of the wave is
$\nu =\frac{v}{\lambda }=\frac{300\text{m/s}}{0.60\times {10}^{-2}\text{m}}=50000\text{Hz}$
This is much above the audible range. It is an ultrasonic wave and will not be audible.