A single slit of width is illuminated by monochromatic light

PHYSICS · Single correct · CBSE · Physics · Wave Optics · Wave Optics

Problem

A single slit of width

0.20\,\text{mm}

is illuminated by monochromatic light. The third diffraction minimum is observed at an angle of

4.5^{\circ}

from the central axis. What is the wavelength of the light? (a)

1.6\times10^{-5}\,\text{m}

(b)

5.2\times10^{-7}\,\text{m}

(c)

5.2\times10^{-6}\,\text{m}

(d)

7.8\times10^{-6}\,\text{m}