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Question

Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible resulting intensities are :
  1. 5I and 0
  2. 5I and 3I
  3. 9I and I
  4. 9I and 3I

A
9I and 3I
B
5I and 0
C
5I and 3I
D
9I and I
Solution
Verified by Toppr

Maximum intensity, Imax=(I1+I2)2
=(I+4I)2
=9I
Minimum intensity Imin=(I1I2)2
(I4I)2
=I

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