Re: Why can't the moon be used to communicate with the other side of the world

I believe the answer to your question actually has more to do with the 
irregular surface of the moon than the ability of the moon to reflect 
radiation.  In fact, as you can see from the article below, it is 
possible to send and receive radar signals from the moon.  Some astronomers 
have recently employed this trick to use radar to map the surface of the 
moon.  I've included a link to the full article at the end of this reply if 
you're interested in learning more about this.

In addition to the surface of the moon being irregular enough to make 
directing a signal to the other side of the earth difficult, another reason 
why it isn't practical is the time delay.  The moon is far enough away that 
there is a several second delay to send and receive communication signals 
across that distance.

Hope this helps answer your question!
 http
://news.bbc.co.uk/hi/english/sci/tech/newsid_359000/359840.stm