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Question: Answered & Verified by Expert
Two monochromatic beams of intensities I and 4I respectively are superposed to form a steady interference pattern. The maximum and minimum intensities in the pattern are
PhysicsWave OpticsMHT CETMHT CET 2021 (24 Sep Shift 2)
Options:
  • A $4 \mathrm{I}$ and $\mathrm{I}$
  • B 9I and $3 \mathrm{I}$
  • C $5 \mathrm{I}$ and $3 \mathrm{I}$
  • D 9I and I
Solution:
2679 Upvotes Verified Answer
The correct answer is: 9I and I
$\begin{aligned} & I_{\max }=I+4 I+2 \sqrt{(I)(4 I)}=9 I \\ & I_{\min }=I+4 I-2 \sqrt{(I)(4 I)}=I\end{aligned}$

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