Microwaves of wavelength 2 cm are incident normally on a gap between two thick metal plates. If the width of the gap is 5 cm, calculate the
(1) angle at which the first minimum of the diffraction pattern will occur.
(2) separation of the first-order minimum and the second-order minimum when observed from a distance 1.5 m from the slit.
(3) How many minima are there?