Case : Read the passage and answer the question(s).

A tourmaline crystal is placed such that its crystallographic axis AB is parallel to y-axis. Sunlight is made to pass through it. After the emergence of light from the tourmaline crystal, certain properties of the light are affected.

What can you say about the phenomenon?

Polarization

Sunlight is unpolarized light. When it is made to pass through a tourmaline crystal, the crystal acts as a polaroid and restricts the vibrations of the unpolarized light to the single plane.