Problem

A single slit forms a diffraction pattern, with the first minimum at an angle of

45^\circ

from central maximum, using monochromatic light of

490 \text{ nm}

wavelength. What is the width of the slit? (a)

762 \text{ nm}

(b)

692 \text{ nm}

(c)

760 \text{ nm}

(d)

668 \text{ nm}