Re: Wave guides for very low frequencies Hz-kHz

On Mon, 1 Sep 2008, Benj wrote:

> On Sep 1, 4:09=A0pm, "Timo A. Nieminen" <t...@[EMAIL PROTECTED]
> wrote:
>=20
> > Through it, or around it? In any case, you'll get tunnelling even if
> > you're below cut-off.
>=20
> "tunneling"???!!!
>=20
> Puhleeeze!  Hey Timo, time to hit the sophomore E&M textbook again!
> What do you think he built? "Quantum conduits" for the star ****p
> Enterprise?

You bought into the QM propaganda that tunnelling is a "purely quantum"=20
phenomenon? FYI, evanescent transmission through below cut-off
waveguides,=
=20
FTIR, coupling between optical fibres, and radiation from bent optical=20
fibres are all perfectly good classical examples of tunnelling. The
last=20
one is especially cute, being tunnelling from the waveguide to a point in=
=20
free space.

There's a sizable literature on all this; read and learn.

--=20
Timo Nieminen - Home page: http://www.physics.uq.edu.au/people/nieminen/
E-prints: http://eprint.uq.edu.au/view/person/Nieminen,_Timo_A..html
Shrine to Spirits: http://www.users.bigpond.com/timo_nieminen/spirits.html