Velocity of sound waves in air is $330ms^{- 1}$. For a particular sound in air, a path difference of 40cm is equivalent to a phase difference of $1.6\pi$.The frequency of the wave is

Question

Dr. Abubacker · Accepted Answer

(c) Here, $v = 330\ ms^{- 1}$
Phase difference of $1.6\pi = 40\ cm$
Phase difference of $2\pi = \frac{40}{1.6\pi} 	imes 2\pi\ cm = 50\ cm$
ie, $\lambda = 50\ cm = 0.5\ cm$
$n = \frac{v}{\lambda} = \frac{330}{0.5} = 660\ Hz$

Q. Velocity of sound waves in air is $330ms^{- 1}$. For a particular sound in air, a path difference of 40cm is equivalent to a phase difference of $1.6\pi$.The frequency of the wave is

Explanation

Reviewed by Dr. Abubacker

Want more practice?