Microwaves of wavelength $2.25 imes 10^{-2} \mathrm{~m}$ is diffracted by a rectangular slit of wi

Question

Microwaves of wavelength $2.25 	imes 10^{-2} \mathrm{~m}$ is diffracted by a rectangular slit of width $4.5 	imes 10^{-2} \mathrm{~m}$. The rays fall normal to the plane of the slit. The angular spread of the central maximum is\

Professor PC Thomas Classes · Answer

$\operatorname{Sin} 	heta=\lambda / d=1 / 2$\ i.e; $	heta=30^{\circ}$ and hence angular spread $=2 	heta=60^{\circ}$\