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: (a) 3 (b) 4 (c) 2 (d) 1

Answer: (b). 4: 1 ⇒ amplitudes 2: 1, so Imax = 9, Imin = 1 (units). Imax+IminImax-Imin = 10/8 = 5/4 So x = 4; the answer is (b) 4.

The interference pattern is obtained with two coherent light sources… | JEE Main 2022 (25 Jun, Shift 2)

Q69JEE Main 2022 · 25 JUN · SHIFT 2Medium

Superposition, Coherence & Intensity

The interference pattern is obtained with two coherent light sources of intensity ratio 4: 1. And the ratio $\frac{I_{\max} + I_{\min}}{I_{\max} - I_{\min}}$ is $\frac{5}{x}$ . Then, the value of x will be equal to:

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Answer: (b)

$4 : 1 \Rightarrow$ amplitudes $2 : 1$ , so $I_{max} = 9$ , $I_{min} = 1$ (units).
$\frac{I_{max}+I_{min}}{I_{max}-I_{min}} = \frac{10}{8} = \frac{5}{4}$
So $x = 4$ ; the answer is (b) 4.

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