The angular width of the central maximum in a single slit diffraction pattern is `60 ^(@)` . The width of the slit is ` 1 mu m ` . The slit is illuminated by monochromatic plane waves . If another slit of same width is made mear it young's fringes can be observed in a screen placed at a distance 50 cm from the slits , if slits , if the observed fringe width is 1 cm , what is slit separation distance ( i . e, distance between the sentres of each slit )

Options

A. `75 mu m `
B. `100 mu m `
C. `25 mu m `
D. `50 mu m `