On Jan 3, 5:41*pm, "Szczepan Bialek" wrote:
....

Szczepan Bialek wrote:

But in antennas charge appears and disappears. Electric waves must
appear.
Some Authors call them electrostatic waves.

Complete nonsense.

"Waves in plasmas can be classified as electromagnetic or electrostatic
according to whether or not there is an oscillating magnetic field. Applying
Faraday's law of induction to plane waves, we find , implying that an
electrostatic wave must be purely longitudinal. An electromagnetic wave, in
contrast, must have a transverse component, but may also be partially
longitudinal. From:http://en.wikipedia.org/wiki/Waves_in_plasmas

In space is the rare plasma + dust.
S*

sure, and in the rare plasma of most of space omega-p goes to zero so
the remaining waves are pure electromagnetic. you can only support
those other wave types in a dense plasma as in the lower levels of the
solar atmosphere or in a confined plasma in a laboratory. you might
as well take the basic Maxwell's equations and claim they don't work
on the Earth's surface because air has a different dielectric constant
that in space... while this is true, the results are rarely measurably
different than free space.