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The interference pattern is obtained with two coherent light sources of intensity ratio 4 : 1. And the ratio (Iₘₐₓ + Iₘᵢₙ)/(Iₘₐₓ - Iₘᵢₙ) is 5/x. Then, the value of x will be equal to

Asked in JEE Main 25th June 2nd Shift 2022 · Intensity and coherent sources

• (1) 3
• (2) 4
• (3) 2
• (4) 1

Step-by-step solution

Why the other options are wrong

• (1) Uses intensities directly: (4+1)/(4-1).
• (3) Takes Iₘₐₓ - Iₘᵢₙ as the amplitude difference.
• (4) Takes Iₘₐₓ-Iₘᵢₙ = 5.

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