"Scott Bicknell" wrote in message
ink.net...
Darkhorse wrote:

BTW, has a raser (radio equivalent of a laser) been invented yet?

Yes, its called a beam antenna.

no. . a beam antenna is more similar to a lens.
lasers have an excited medium, that is made to dump out photons in sync.

masers do this in the microwave region, but i'm not aware of anything
reaching down anywhere near this far.