A plane light wave with wavelength X = 0.60 ti,m falls
normally on the face of a glass wedge with refracting angle e = 15∘.
The opposite face of the wedge is opaque and has a slit of width
b = 10 ttni parallel to the edge. Find:
(a) the angle AO between the direction to the Fraunhofer maximum
of zeroth order and that of incident light;
(b) the angular width of the Fraunhofer maximum of the zeroth
order.