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Two coherent monochromatic light beams o...

Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are

A

5I and I

B

5I and 3I

C

9I and I

D

9I and 3I

Text Solution

Verified by Experts

The correct Answer is:
C
`I_(max)=(sqrt(I_(1))+sqrt(I_(2)))^(2)=(sqrt(4I)+sqrt(I))^(2)=9I`
`I_("min")=(sqrt(I_(1))-sqrt(I_(2)))^(2)=(sqrt(4I)-sqrt(I))^(2)=I`
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