Question

What is the SI unit of normal shift?​

Answer 1

Answer:

The solid red line is the emergent ray. It bends due to refraction. The dotted line is the direction of the incident ray. Our eyes cannot perceive the bending of light and assumes that light travels in a straight line so the position of the object appears to be shifted. This is called lateral displacement or shift. The incident ray and emergent ray are parallel.

d=h sin