Light can travel in vacuum but sound cannot travel. Explain.

Explanation

### Step-by-Step Solution:

1. **Definition of Light and Sound**:
- Light is an electromagnetic wave, while sound is a mechanical wave. This fundamental difference is crucial in understanding their propagation.

2. **Medium Requirement for Sound**:
- Sound waves require a medium (solid, liquid, or gas) to travel. This is because sound is produced by the vibration of particles in a medium. For sound to propagate, these particles must be able to collide with each other, transferring energy from one particle to the next.

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