Two periodic waves of intensities $I_1$ and $I_2$ pass through a region at the same time in the same…
Two periodic waves of intensities $I_1$ and $I_2$ pass through a region at the same time in the same direction, the sum of the maximum and minimum intensities is
$(\sqrt{I_1} - \sqrt{I_2})^2$
$2(I_1 + I_2)$
$I_1 + I_2$
$(\sqrt{I_1} + \sqrt{I_2})^2$
Solution
$I_{\text{max}} = I_1 + I_2 + 2\sqrt{I_1I_2}$ and $I_{\text{min}} = I_1 + I_2 - 2\sqrt{I_1I_2}$
$\therefore \quad \text{Sum of maximum and minimum intensities} = 2(I_1 + I_2)$