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Two coherent sources of intensity ratio `beta` interfere, then `(I_(max)-I_(min))/(I_(max)+I_(min))` is
A. `(beta)/(1+beta)`
B. `(2sqrt(beta))/(1+beta)`
C. `(2sqrt(beta))/(1+sqrt(beta))`
D. `(2beta)/(1+sqrt(beta))`

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Correct Answer - B
`(I_(1))/(I_(2)) = beta , I_(max) = (sqrt(I_(1)) + sqrt(I_(2)))^(2) I_(min) = (sqrt(I_(1)) - sqrt(I_(2)))^(2)`

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