Question

Sound travels in air at $340\text{m/s}$. In air, a sound source is producing a sound wave of wavelength $34\text{cm}$. Find the time period of this sound wave.

• A. $1\text{s}$
• B. $0.1\text{s}$
• C. $0.01\text{s}$
• D. $0.001\text{s}$

Answer 1

The correct option is D $0.001\text{s}$

We know that, the speed of a wave,

$v=\frac{\lambda }{T}$

$\Rightarrow T=\frac{\lambda }{v}=\frac{0.34}{340}=0.001\text{s}$