A single slit forms a diffraction pattern

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

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

45^\circ

from the central maximum, using monochromatic light of wavelength

490\,\text{nm}

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

762\,\text{nm}

(b)

692\,\text{nm}

(c)

760\,\text{nm}

(d)

668\,\text{nm}