Physics - Wave Optics Question with Solution | TestHub

In Young's double-slit experiment, the separation between the slits is $d=0.25 \mathrm{cm}$ and the distance of the screen from the slits is $D=100 \mathrm{cm}$. When the wavelength of light used in the experiment is $\lambda =6000 \mathrm{\AA }$, the intensity at a distance $x=4\times {10}^{-5} \mathrm{m}$ from the central maximum is $\frac{p}{q}{I}_0$, where $I_0$ is the intensity of central maxima and $p$ and $q$ are the smallest integers. What is the value of $p+q$?