A ray of light is incident (just close to) at critical angle on slab of thicknes4/A ray of light is incident (just close to) at critical angle

Question

A ray of light is incident (just close to) at critical angle on slab of thickness \(\frac{4}{\sqrt3}cm\). Refractive index of slab is \(\sqrt{12}\). The lateral displacement of ray when it emerges from air is 

(1) \(2(1+\frac{\sqrt{11}}{\sqrt{143}})cm\) 

(2) \(2(1-\frac{\sqrt{11}}{\sqrt{143}})cm\) 

(3) \((1+\frac{\sqrt{11}}{\sqrt{143}})cm\) 

(4) \(4(1-\frac{\sqrt{11}}{\sqrt{143}})cm\)

Answer 1

Correct Option is (2) \(2(1-\frac{\sqrt{11}}{\sqrt{143}})cm\)