"K1TTT" wrote
...
On Aug 6, 7:42 am, "Szczepan Bialek" wrote:

In our textbooks is wrote "whats a pity that to teaching was choosen
Heaviside not Ampere".
But Ampere is too sophisticated for students.

So, "I feel quite safe, thanks."

maybe in your 19th century text books, mine has plenty of Ampere in
it. you must remember, those guys were working things out as they
went along, their early writings were likely replaced by later ones
that changed with improved observations that disproved what they
thought at first.

Ampere, Gauss, Weber, Maxwell are too difficult for student.

and then many things changed after the michaelson-
morley experiment dispelled the last believers in aether.

MMX proved that no motionless solid ether. Such was necessary for the
transverse waves.

so unless
you are studying things after that you are likely reading outdated and
well disproved early theories.

Now is the plasma physics: "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"

For Tesla ether is: "but sound waves in the ether, behaving in every respect
like those
in the air, except that, owing to the great elastic force and extremely
small density of the medium, their speed is that of light."

For Dirac it was an electrons see.

Now we know that in the electron see are the positive ions, So the plasma is
neutral.

As you see people step by step go ahead. Only you are standing in the
Heaviside's water (hydraulic analogy).
S*