Beats are produced by two waves given by $y_1 = a \sin 2 00…

Physics Wave and Sound Beats and Wavelenght,De-Broglie Wavelenght Single Correct MCQ

Published on: September 12, 2026

Beats are produced by two waves given by $y_1 = a \sin 2 000 \pi t$ and $y_{2} = a \sin 2008 \pi t$ . The number of beats heard per second is

Zero

One

Four

Eight

Text Solution

Verified by Experts

The correct answer is:

Number of beats per second = $n_1 \sim n_2$

$\omega_{1} = 2 000 \pi = 2 \pi n_{1}$ ⇒ ⇒ n 1 = 1000

and $\omega_{2} = 2008 \pi = 2 \pi m_{2}$ ⇒ ⇒ n 2 = 1004

Number of beats heard per sec = 1004 - 1000 = 4

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