why sound cant travel in vaccum

Question

anonymous · Answer

@yogandhar Sound needs particles to travel through unlike light which does not need particles. IN vacuum there aren't any particles present so sound cannot travel through vacuum.

anonymous · Answer

Watch the movie 'Gravity', although usually movies butcher the science of life in space, I think it does a good job at merging fact and cinematography! Gripping and informative :)

rina.r · Answer

Sound is the vibration of molecules, and since there is absolutely nothing in a vacuum, there are no molecules to vibrate. or
Sound is made up of waves . 
Sound needs a medium to travel in. 
A vacuum is void of matter, 
thus no medium to transmit the wave.