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  4. If two waves of intensities I and 4I superpose, the ratio between maximum and minimum intensities is

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Q. If two waves of intensities $I$ and $4I$ superpose, the ratio between maximum and minimum intensities is

KEAMKEAM 2020

Solution:

$\frac{I_{\max }}{I_{\min }}=\left(\frac{\sqrt{I_{1}}+\sqrt{I_{2}}}{\sqrt{I_{1}}-\sqrt{I_{2}}}\right)^{2}=\frac{9}{1}$