A Young's double-slit apparatus is immersed in a liquid of refractive index

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

Problem

1.33

. It has slit separation

1\,\mathrm{mm}

, and the interference pattern is observed on a screen at a distance

1.33\,\mathrm{m}

from the plane of the slits. The wavelength in air is

6300\,\mathrm{\AA}

. Calculate the fringe width. (1)

0.63\,\mathrm{mm}

(2)

1.26\,\mathrm{mm}

(3)

1.67\,\mathrm{mm}

(4)

2.2\,\mathrm{mm}