Q. The maximum intensity in the case if $n$ identical incoherent waves, each of intensity 2 W$m^{- 2}$ is 32$Wm^{- 2}$. The value of $n$ is
A) 4
B) 16
C) 32
D) 64
Explanation
(b) For incoherent waves,
$I_{\max} = nI$
$\therefore\ \ \ n = \frac{I_{\max}}{I} = \frac{32}{2} = 16$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.