Re: Catt anomaly?

[Bernard Cleyet <anngeorg@PACBELL.NET>]

If you mean c = 2.997....   wrong, an EM wave in a cable or wave guide
travels < c.  Furthermore, the charges are not massive wrt the
frequencies used in such cables, etc.

for the characteristics of coaxial cables, etc.

http://www.ee.ualberta.ca/~ee316/TxL4_5.pdf

off the top of my head, I don't think there is a pair of docs, but it is
a good problem to engender thought.

No doubt others on this list (experts) will add and correct me.

bc

P.s. I suspect the movement of charges has something to do with the < c
velocity.  (N.B. the veloc. is a fcn. of the cap. and the resistivity,
among other factors.


Savinainen Antti wrote:

> Hello,
>
> I learnt from my ex-student in the University of Cambridge about the =
> Catt anomaly. He wrote on 15th November 2001 (excerpt from http://www=
> .bluesci.com/~rpaju/):
>
> =94Tonight's evening lecture was at the Engineering Department, by Iv=
> or Catt on the 'Catt Question' of electromagnetism. What he calls an =
> anomaly, is a basic question about transmission lines: when a pulse i=
> s sent down a simple cable (e.g. coaxial), the edge of the electric f=
> ield is moving at c. Because field lines start and end on charges, th=
> ere must be charges accumulating on the conductors as the field moves=
>  on. Where do the charges come from? The essential problem is that th=
> e charges, which are massive, must be moving at c as well, which viol=
> ates special relativity.=94
>
> Catt explains his question and attempts to answer it in
> <http://www.electromagnetism.demon.co.uk/w99anbk2.htm>.=20
>
> I have no competence to decide if the Catt anomaly is a real problem =
> or not. Any comments?
>
> Regards,
>
> Antti Savinainen
> Kuopion Lyseo High School
> Finland
>
> Homepage: <http://personal.inet.fi/tiede/physics/>