The angular width of the central maximum in a single slit diffraction pattern is . The width of the slit is . 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 from the slits. If the observed fringe width is , what is slit separation distance? (i.e., the distance between the centers of each slit.)