Re: [Phys-l] radio vs. light

[Brian Whatcott <betwys1@sbcglobal.net>]

At 03:06 PM 7/19/2007, you wrote:
> I do NOT intend to defend this Sciam article....
> I don't think the author understands this - he seems to believe in
> some more fundamental (and fictional) difference between light and
> radio radiation.
>
>
> Bob Sciamanda


I haven't read the piece in question, but I can certainly confirm
 there is a rather fundamental difference between a typical radio beam
 and a typical light ray - one that determines the ability to 
interfere in fact.
That quality is coherence: rather difficult to make a radio beam incoherent,
rather difficult to make a light beam coherent before the last half century.



Brian Whatcott    Altus OK    Eureka!