Question

prove that if angle of incidence and Angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that, i=e.

Answer 1

Steps and Understanding :
1) We will construct a diagram, consisting of slab with proper labelling as shown in figure.

2) Then, we will prove same angles by alternate interior angles property.

3) Use Snells Law in both incident to refracting and refracting to emergence rays.

4) We will obtain required result as shown in pic.