Question

A ray of light falls normally on the surface of a transparent glass slab.Draw a ray diagram to show its path and also mark angle of incidence and angle of emergence.

Answer 1

If a ray of light falls normally on the surface of a transparent glass slab,
I (angle of incidence )=0
Then r = 0, As $u=\frac{\left(sini\right)}{\left(sinr\right)}$
Hence angle of emergence = 0