alleryTwo coherent sources have intensities I1 = 9I and I2 = I. Maximum and minimum intensities in interference pattern:
A10I, 8I
B16I, 4I
C9I, I
D16I, 0
Answer & Solution
Correct answer: B. 16I, 4I
Amplitudes A1 ∝ sqrt(9I) = 3 sqrt(I), A2 = sqrt(I).
We have I_max = (A1 + A2)².
So I_max = 16I.
We have I_min = (A1 - A2)².
So I_min = 4I.
(Not 0 since intensities are unequal.)
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