Light of wavelength strikes a grating with lines per millimeter

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

Problem

Light of wavelength

550\,\text{nm}

strikes a grating with

600

lines per millimeter. What is the angle, measured from the central maximum, at which the first-order bright fringe appears? (a)

34^{\circ}

(b)

19^{\circ}

(c)

42^{\circ}

(d)

12^{\circ}