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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))`

Text Solution

Verified by Experts

The correct Answer is:
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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