Question

explain why sound cannot travel through vaccum

Answer 1

Sound is a mechanical wave which needs material medium such as solid , liquid or gas to propagate. So , it cannot travel through vacuum . It is the characteristic of a sound wave.

Answer 2

 A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.Sound travels in mechanical wave. So it needs a material medium for its propagation. This demonstrates that the sound wave cannot travel through vacuum.