In the following arrangement y = 1.0 mm, d= 0.24 mm and D = 1.2 m. The work function of the material of the emitter is 2.2 eV. The stopping potential V needed to stop the photo current will be

As we know in Young's double slit experiment fringe width = separation between two consecutive fringe or dark fringes Energy of light incident on photo plateAccording to Einstein photoelectric equationE = W0 + eV0