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`n` identical coherent waves each with the same initial phase arrive at a point with identical path length. The intensity produced at this point is `l_(1)`. If the waves are all incoherent, the intensity produced is `l_(2)`. The ratio `(l_(1))/(l_(2))` is

A

`nl_(0)`

B

`n^(2)l_(0)`

C

`n^(3)l_(0)`

D

`(l_(n))/(n)`

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The correct Answer is:
B
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