Subject: Sound in a vacuum.

I would like to know why light can travel in a vacuum, but
sound can't -- does it have to do with light being a 
particle and a wave at the same time while sound is only
a wave ?????????????

Also, if sound can't travel in a vacuum, what happens to
the energy from some event in space that would normally be 
converted into sound?

Thanks for answering my questions. I'm really glad you guys
do this for all of us who just don't know.

Re: Sound in a vacuum.