Assertion (A): Statement I: In Young's experiment, for two coherent sources, the resultant inten...

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Assertion (A): Statement I: In Young's experiment, for two coherent sources, the resultant intensity is given by \( I=4 I_{0} \cos ^{2} \frac{\phi}{2} \).
Reason (R): Statement II: Ratio of maximum to minimum intensity
\[
\text { is } \frac{I_{\max }}{I_{\min }}=\frac{\left(\sqrt{I_{1}}+\sqrt{I_{2}}\right)^{2}}{\left(\sqrt{I_{1}}-\sqrt{I_{2}}\right)^{2}} \text {. }
\]
(A) Both A and R are true and R is the correct explanation of A.br(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(E) Both A and R are false.
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