Question

What will be the effect on the width of the central bright fringe in the diffraction pattern of a single slit if:
$\left(1\right)$ Monochromatic light of smaller wavelength is used.
$\left(2\right)$ Slit is made narrower

Answer 1

$\left(1\right)$ Width of the central bright fringe in the diffraction pattern decreases when light of smaller wavelength is used.
$\left(2\right)$ Width increases when slit is made narrow.