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MHT CET 2025 (19 Apr, Shift 1) · Superposition, Coherence & Intensity

Superposition, Coherence & Intensity question from MHT CET 2025 (19 Apr, Shift 1)

Q26MHT CET 2025 · 19 APR · SHIFT 1Medium

Superposition, Coherence & Intensity

In Young's double slit interference experiment, using two coherent sources of different amplitudes, the intensity ratio between bright to dark fringes is $5 : 1$ . The value of the ratio of resultant amplitudes of bright fringe to dark fringe is

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Answer: (b)

Intensity $\propto$ (resultant amplitude) $^2$ , so $\frac{A_{max}}{A_{min}} = \sqrt{\frac{I_{max}}{I_{min}}}$
$= \sqrt{5}$
So the answer is (b) $\sqrt{5} : 1$ .

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