JEE Main 2022 · 27 Jul · Shift 2 · Physics Q46

← JEE Main 2022 · 27 Jul · Shift 2

PhysicsSingle correct+4 / -1Question 46 of 90

Two coherent sources of light interfere. The intensity ratio of two sources is 1 : 4. For this interference pattern if the value of $\dfrac{I_{\max}+I_{\min}}{I_{\max}-I_{\min}}$ is equal to $\dfrac{2\alpha+1}{\beta+3}$ , then $\dfrac\alpha\beta$ will be :

1.5

0.5

Answer and worked solution

Official answer: B

Amplitudes in ratio 1 : 2, so $I_{\max}:I_{\min}=9:1$ and $\frac{I_{\max}+I_{\min}}{I_{\max}-I_{\min}}=\frac54$ .

Match. $\frac{2\alpha+1}{\beta+3}$ with $\alpha=2$ , $\beta=1$ , so $\frac\alpha\beta=2$ .

(B)

Topics:Interference and Young's double slit

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JEE Main 2022 · 27 Jul · Shift 2, Physics question 46