two periodic waves of intesities l(1) an...

two periodic waves of intesities `l_(1) and l_(2)` pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is

A

`I_(1) + I_(2)`

B

`(sqrt(I_(1) +sqrt(2))^(2))`

C

`(sqrt(I_(1)- sqrt(I_(2))^(2))`

D

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

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The correct Answer is:

D

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