Which one of the following relations gives the angular position of the first…

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

Problem

Which one of the following relations gives the angular position

\theta

of the first diffraction minimum produced by a single slit of width

a

using monochromatic light of wavelength

\lambda

? (a)

a\sin\theta=\dfrac{\lambda}{2}

(b)

2a\sin\theta=\lambda

(c)

a\sin\theta=\lambda

(d)

a\sin\theta=3\lambda