Question

What is lateral shift??? In light-Reflection and Refraction lesson..

Answer 1

When an incident ray strikes on a glass slab and the ray which bends in the glass slab away from normal is called emergent ray  but there is a shift from initial path of incident ray with respect to emergent ray.This shift is called lateral shift.

Answer 2

the perpendicular distance between the incident and emergent ray after passing through a glass slab