Example 42: A set of 10 parallel equidistant slits of width 0.50 cm and opaque space 1.4 cm are used to study Fraunhofer diffraction of λ=0.6cm, falling normally on the planes of the slits. Calculate:
(i) angular position and half width of first maximum.
(ii) the effect of covering up alternative slits on angular position and width of first maximum.