Physics

Problem

The first diffraction minimum due to the single slit diffraction is seen at

\theta = 30^\circ

for a light of wavelength

5000 \text{ \AA}

falling perpendicularly on the slit. The width of the slit is (a)

2.5 \times 10^{-5} \text{ cm}

(b)

1.25 \times 10^{-5} \text{ cm}

(c)

10 \times 10^{-5} \text{ cm}

(d)

5 \times 10^{-5} \text{ cm}