Question

How sound propagates . can sound propagates through vaccum?

Answer 1

Sound requires medium to travel. Without medium (vaccum) it can not travel.

Answer 2

$\Large{\underline{\underline{\bf{Solution :}}}}$

When an object vibrates (and makes sound), then the air layers around it also start vibrating in exactly in the same way and carry sound waves from the sound producing object to our ears. Transmission of sound requires a material medium so it cannot travel through vacuum.

In laboratory a vibrating tuning fork is used for producing sound. During vibration, the prong of the tuning fork moves from one extreme position to another about its mean position (the position when it is at rest).

$\rule{150}{2}$

Now, sound can't propagates in vaccum. Because it need's a medium to propagate.