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

In an experiment of single slit diffraction pattern,the first minimum for red light coincides with the first maximum of some other wavelength. If the wavelength of red light is $6600\,\mathring{A}$,then the wavelength of the first maximum will be.....$\mathring{A}$

In Fraunhofer diffraction due to a single slit,find the path difference for the $n^{th}$ order minimum.

Light of wavelength $600 \,nm$ is incident normally on a slit of width $0.2 \,mm$. The angular width of the central maxima in the diffraction pattern is (measured from minimum to minimum):

In a single-slit diffraction experiment,the first minimum for a wavelength $\lambda_1 = 660 \ nm$ coincides with the first maximum for a wavelength $\lambda_2$. Find the value of $\lambda_2$ in $nm$.

How will the diffraction pattern change when yellow light is replaced by blue light? The fringe will be :-