In Young's double-slit experiment, a monochromatic source of wavelength $λ$ is used. The intensity of light passing through each slit is $I_0$. The intensity of light reaching the screen $S_c$ at a point P, a distance $x$ from O, is given by (Take $d \ll D$).

Question

$I_0 \cos^2 \left(\frac{\pi d}{4 \lambda D} x\right)$

$4I_0 \cos^2 \left(\frac{\pi d}{\lambda D} x\right)$

$I_0 \sin^2 \left(\frac{\pi d}{2 \lambda D} x\right)$

$4I_0 \cos^2 \left(\frac{\pi d}{2 \lambda D} x\right)$

Solution

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