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JEE Main 2025 (3 Apr, Shift 2) · Superposition, Coherence & Intensity

Superposition, Coherence & Intensity question from JEE Main 2025 (3 Apr, Shift 2)

Q23JEE Main 2025 · 3 APR · SHIFT 2Easy

Superposition, Coherence & Intensity

Two monochromatic light beams have intensities in the ratio 1:9. An interference pattern is obtained by these beams. The ratio of the intensities of maximum to minimum is

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Answer: (b)

Intensity ratio $1:9 \Rightarrow$ amplitude ratio $1:3$ .
$\frac{I_{max}}{I_{min}} = \left(\frac{1+3}{3-1}\right)^2 = \frac{16}{4} = 4$
So the answer is (b) $4 : 1$ .

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