Question

Mechanical waves cannot travel through _____.

Answer 1

1. A mechanical wave is a disturbance that takes place in a material medium and is responsible for transferring energy through the material medium.
2. A sound wave is an example of a mechanical wave.
3. Mechanical waves require a material medium for their propagation.
4. Therefore, mechanical waves can travel through solids, liquids and gases but not through vacuum.

Hence, mechanical waves cannot travel through vacuum.