WBJEE · Physics · Waves and Sound
Two monochromatic coherent light beams \(A\) and \(B\) have intensities \(L\) and \(\frac{L}{4},\) respectively. If these beams are superposed, the maximum and minimum intensities will be
- A \(\frac{9 L}{4}, \frac{L}{4}\)
- B \(\frac{5 L}{4}, 0\)
- C \(\frac{5 L}{2}, 0\)
- D \(2 L, \frac{L}{2}\)
Answer & Solution
Correct Answer
(A) \(\frac{9 L}{4}, \frac{L}{4}\)
Step-by-step Solution
Detailed explanation
For maximum intensity, \[ I_{\max }=I_{1}+I_{2}+2 \sqrt{I_{1} I_{2}} \cos \delta \]…
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