A thin glass prism of unknown refractive index is tested in air and then completely…

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A thin glass prism of unknown refractive index is tested in air and then completely immersed in water (

n_{\text{water}}=1.33

). Its apex angle is

4^{\circ}

. The measured angular deviations are

2.0^{\circ}

in air and

0.50^{\circ}

in water. The refractive index of the glass is (a)

1.84

(b)

1.43

(c)

1.50

(d)

1.63