Q. When two wave of almost equal frequencies $n_{1}\ and\ n_{2}$are produced simultaneously, then the time interval between successive maxima is
A) $\frac{1}{n_{1} - n_{2}}$
B) $\frac{1}{n_{1}} - \frac{1}{n_{2}}$
C) $\frac{1}{n_{1}} + \frac{1}{n_{2}}$
D) $\frac{1}{n_{1} + n_{2}}$
Explanation
(a) Number of beats $s^{- 1} = n_{1} - n_{2}$
$\therefore$ Time interval between two successive beats/successive maxima $= \frac{1}{n_{1} - n_{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.