Give two points of difference between an interference pattern due to a double-slit and a diffraction pattern due to a single slit.

Central fringe obtained in diffraction pattern due to a single slit-

In single slit diffraction pattern :

Write two points of difference between interference and diffraction pattern of light.

In a single slit diffraction pattern

The condition for obtaining maximum in the diffraction pattern due to a single slit is

(a) Explain two features to distinguish between the interference pattern in Young's double slit experiment with the difference pattern obtained due to a single slit. (b) A monochromatic light of wavelength 500 nm is incident normally on a single slit of width 0.2 nm of produce a diffraction pattern. Find the angular width of the central maximum obtained on the screen. Estimate the number of fringes obtained in Young's double slit experimental with fringe width 0.5 mm , which can be accommodated within the region of total angular spread of the central maximum due to single slit.