Which of the following expressions gives the approximate angular width of the central…

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

Problem

Which of the following expressions gives the approximate angular width

\theta

of the central maximum in the diffraction pattern produced by a single slit of width

a

for light of wavelength

\lambda

? (a)

\dfrac{\lambda}{a}

(b)

\dfrac{2\lambda}{a}

(c)

\dfrac{a}{\lambda}

(d)

\dfrac{\pi\lambda}{a}