Angle of incidence

The video tutorial explains the concept of reflection, focusing on how a ray or beam reflects off a surface. It introduces the angle of incidence, defined as the angle between the incoming ray and a line perpendicular to the surface. The tutorial then covers the law of reflection, stating that the angle of incidence is equal to the angle of reflection.

What is the significance of the approaching ray in reflection?

Explain what is meant by the term 'perpendicular' in the context of reflection.