What is the lateral shift of a ray refracted through a parallel-sided glass slab of thickness ' $h$

Question

What is the lateral shift of a ray refracted through a parallel-sided glass slab of thickness ' $h$ ' in terms of the angle of incidence ' $i$ ' and angle of refraction ' $r$ ', if the glass slab is placed in air medium?\

Professor PC Thomas Classes · Answer

(d) : Lateral shift in rectangular glass slab,\ $d=B C=O B \sin (i-r)$\ $=\frac{h}{\cos r} \sin (i-r) \quad d=h \frac{\sin (i-r)}{\cos r}$