Uzytkownik "K1TTT" napisal w wiadomosci
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On Oct 17, 4:32 pm, "Szczepan Bialek" wrote:

More generally, the Stokes drift velocity is the difference between the
average Lagrangian flow velocity of a fluid parcel, and the average
Eulerian
flow velocity of the fluid at a fixed position. This nonlinear phenomenon
is
named after George Gabriel Stokes, who derived expressions for this drift
in
his 1847 study of water waves."

This nonlinear phenomenon is in each real wave. In texbooks are a paper
waves - for kids. They are linear and symmetric.

"just move it back and forth around a point" is a simplification necessary
in schools.

ah, but that requires fluid flow. electromagnetic waves do not
require fluid flow or they could not travel at c.

EM waves are the torsional vibrations in a solid dielectric. In solids are
the strains. Tiny flows.

There may be some
analogous phenomena in plasma where you can get non-linear effects but
they would not propagate at c, they would be at some much smaller
velocity.

The vector calculus describe only movements.
Ancient people describesd the planet movements. But the planet were
described more later.

The same is with the radio waves. They are still not described physically.
In the description must be words electrons and voltage.
S*