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WBJEE · Physics · Wave Optics

Two coherent monochromatic beams of intensities \(I\) and \(4 I\) respectively are superposed. The maximum and minimum intensitien in the reaulting pattern are

  1. A 5I and 3I
  2. B 9I and 3I
  3. C 4I and I
  4. D 9I and I
Verified Solution

Answer & Solution

Correct Answer

(D) 9I and I

Step-by-step Solution

Detailed explanation

We know that The maximum intensities \[ I_{\max }=\left(\sqrt{I_{1}}+\sqrt{I_{2}}\right)^{2} \] The minimum intensities \[ I_{\min }=\left(\sqrt{I_{1}}-\sqrt{I_{2}}\right)^{2} \] So, the ratio of the maximum and minimum of intensities is…