(i) In diffraction due to a single slit, the phase difference between light waves reaching a point on the screen is 5`pi`.Explain whether a bright or a dark fringe will be formed at the point.
(ii)What should the width (a) of each slit be to obtain eight maxima of two double-slit patterns (slit separation d) within the Central maximum of the single slit pattern?
(iii) Draw the plot of intensity distribution in a diffraction pattern due to a single slit.