What is polarisation of light ? What is its most important significance ?

Explanation

### Step-by-Step Solution:

1. **Definition of Light Polarization**:
- Polarization of light refers to the phenomenon where the oscillations of light waves are restricted to a particular plane.

2. **Understanding Unpolarized Light**:
- Light waves can oscillate in multiple directions. When the oscillations occur in all possible directions, the light is termed as unpolarized light.

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