Monochromatic light of wavelength falls on two slits apart

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

Problem

Monochromatic light of wavelength

600\,\text{nm}

falls on two slits

0.40\,\text{mm}

apart. The screen is

1.2\,\text{m}

away. Find the distance between the

2

nd bright fringe and the

3

rd dark fringe on the same side of the central maximum. (a)

1.2\,\text{mm}

(b)

0.9\,\text{mm}

(c)

1.8\,\text{mm}

(d)

0.6\,\text{mm}