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Two periodic waves of intensities I1 and...

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

A

`(sqrt(l_(1))+sqrtl_(2))^(2)`

B

`(sqrt(l_(1))-sqrtl_(2))^(2)`

C

I_(1)+I_(2)`

D

`2(I_(1)+I_(2))`

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The correct Answer is:
D
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