Physics - Wave Optics Question with Solution | TestHub

The angular width of the central maximum in a single slit diffraction pattern is$60°$. The width of the slit is$1 \mathrm{\mu m}$. The slit is illuminated by monochromatic plane waves. If another slit of the same width is made near it, Young's fringes can be observed on a screen placed at a distance$50\mathrm{cm}$from the slits. If the observed fringe width is$1\mathrm{cm}$, what is slit separation distance? (i.e., the distance between the centres of each slit.)