A two-slit Young's interference experiment is done with monochromatic light of wavelength

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

Problem

6000\ \text{\AA}

. The slits are

2\ \text{mm}

apart. The fringes are observed on a screen placed

10\ \text{cm}

away from the slits. A transparent plate of thickness

0.5\ \text{mm}

is placed in front of one slit, and the interference pattern shifts by

5\ \text{mm}

. The refractive index of the transparent plate is (a)

1.2

(b)

0.6

(c)

2.4

(d)

1.5