When a wave or light ray moves from one medium to another its speed changes. The direction of the ray may also change. This property of waves is called refraction and commonly occurs with light rays.

The change in direction of a beam of light as it travels from one material to another is called refraction. The normal is a construction line drawn at right angles to the surface of the glass block.

Get: NCERT Class 10 Lab Manuals PDF Below are some examples of competency-based questions from Chapter 9, focusing on Light – ...