InterviewSolution
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InterviewSolution
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The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference patten, the ratio `(I_(max)-I_(min))/(I_(max)+I_(min))` will beA. (a) `(sqrtn)/((n+1)^2)`B. (b) `(2sqrtn)/((n+1)^2)`C. (c) `(sqrtn)/(n+1)`D. (d) `(2sqrtn)/(n+1)` |
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Answer» Correct Answer - D Let `I_1/I_2=n/1` `(I_(max)-I_(min))/(I_(max)+I_(min))=((sqrtI_1+sqrtI_2)^2-(sqrtI_1-sqrtI_2)^2)/((sqrtI_1+sqrtI_2)^2(sqrtI_1-sqrtI_2)^2)` `=(4sqrt(I_1I_2))/(2(I_1+I_2))` Dividing numberator and denomenator by `I_2`, required ratio `=(2sqrt(I_1//I_2))/((I_1/I_2+1))=(2sqrtn)/(n+1)` |
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