A light ray is incident on a glass slab of thickness 4 √ 3 cm and refractive index √ 2. The angle of incidence is equal to the critical angle for the…

A light ray is incident on a glass slab of thickness $\displaystyle 4 \sqrt{3} \mathrm{~cm}$ and refractive index $\displaystyle \sqrt{2}$ . The angle of incidence is equal to the critical angle for the glass slab with air. The lateral displacement of ray after passing through glass slab is $\displaystyle \_\_\_\_$ cm . (Given $\displaystyle \sin 15^{\circ}=0.25$ )