The angular width of the central maximum in a single-slit diffraction pattern does not depend on .........

The Fraunhofer diffraction pattern of a single slit is formed in the focal plane of a lens of focal length $1\,m$. The width of the slit is $0.3\,mm$. If the third minimum is formed at a distance of $5\,mm$ from the central maximum, then the wavelength of light will be......$\mathring{A}$

The diffraction fringes obtained by a single slit are of

The condition for diffraction is

Light of wavelength $\lambda$ is incident on a slit of width $a$. The resulting diffraction pattern is observed on a screen placed at a distance $D$. If the linear width of the central maximum is equal to the width of the slit,then $D = $ . . . . . . .

$A$ slit of width $d$ is illuminated by light of wavelength $\lambda$. The angular width of the central maximum is: