Explanation :
The process in which the unpolarized light is transferred to polarized light is called polarization of light.
Unpolarized light means a light wave which is vibrating in more than one plane.
In polarization of light, the wave oscillates in a single plane. There are some ways of polarization of light:
- Polarization by Transmission
- Polarization by Reflection
- Polarization by Refraction
- Polarization by Scattering
Hence, the correct option is (C) " The wave oscillates in a single plane ".