Question

The wavelength of waves produced by a source is $50\text{cm}$. If wave velocity is $25{\text{m s}}^{-1}$, what is the time required for one wave to generate?

• A. 0.02

Answer 1

The correct option is A 0.02
Given:
Wavelength $=50\text{cm}=0.5\text{m}$
Velocity of wave $=25{\text{m s}}^{-1}$

We know,
$\text{Frequency}=\frac{\text{Velocity}}{\text{Wavelength}}$
$⟹\frac{25}{0.5}=50\text{Hz}$
Time taken to complete one wave:
$=\frac{1}{\text{Frequency}}=\frac{1}{50}=0.02\text{s}$