Question

A ray of light strikes the surface of a rectangular glass block such that the angle of incidence is ${42}^{°}$. Sketch a diagram to show the approximate path taken by the ray in each case as it passes through the glass block and emerges from it.

Answer 1

1. The bending of light passing from one medium to another medium is called refraction.
2. You know that when the ray of light passes from a rare medium to a denser medium, it bends towards the normal.
3. When the angle of incidence is ${42}^{°}$, then a ray of the light passing from air to the block will bend towards normal.
4. Then the angle of refraction will be less than ${42}^{°}$.