Physics

Problem

A monochromatic light of wavelength

6000 \text{ \AA}

is incident on the single slit of width

0.01 \text{ mm}

. If the diffraction pattern is formed at the focus of the convex lens of focal length

20 \text{ cm}

, the linear width of the central maximum is: (a)

60 \text{ mm}

(b)

24 \text{ mm}

(c)

120 \text{ mm}

(d)

12 \text{ mm}