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In an interference, the intensity of two interfering waves are I and 4I respectively. They produce intensity at two points A and B with phase angle of π/2 and $π$ respectively. Then difference in intensity between them is

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answer is C.

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Detailed Solution

{I_R} = {I_1} + {I_2} + 2\sqrt {{I_1}} \sqrt {{I_2}} \cos \phi \

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