On May 9, 3:24*am, Szczepan Biaùek wrote:
*"JIMMIE" ...
On May 8, 4:51 am, Szczepan Bia³ek wrote:

It seems that at long distances should appear the phenomenon of frequency
doubling.
See:http://www.rp-photonics.com/frequency_doubling.html

Is such?
S*
The laser must be fed into a non-linear medium for the doubling to

occur. The same would be true for RF.Normally the atmosphere and space
are considered fairly linear in respect to *both RF and light, both
forms of EM radiation. Luckily *for us this is the case, otherwise all
radiation would be multipled to xrays and beyound. *The result would
probablybe the termination of all life as we know it.

Very interesting.
May be it take place. You do not analse the intensity after each doubling..
My question apply to the two sources emitters (oscillatig dipole) in a
lineaar medium.
S*

The presence of a non linear medium is always required for frequency
doubling. The only part of the atmoshere that I know of that meets the
qualification is the ionosphere which contains plasma which could act
as a nonlinear medium. I suppose that if the signal were powerful
enough to produce ionization that a frequency could be doubled..

Jimmie