Re: microwave ovens Re: Ball lightning - Terry's thoughts....

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: boris petkovic <petkovic7@xxxxxxxxx>



--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>
>
> At 10:18 PM 8/11/2005, Tesla list wrote:
> >Original poster: Scott Stephens
> <scottxs@xxxxxxxxxxx>
> >
> >Tesla list wrote:
> >
> >>some physics student claimed that microwave ovens
> couldn't produce corona,
> >>since 500 watts RF doesn't give a wave with a high
> enough voltage to
> >>trigger sparks.
>
> To get corona, all you need is a local field >
> 30kV/cm, which is
> pretty easy to achieve with conductive stuff in the
> cavity.  Crumple
> some aluminum foil and throw it in the microwave,
> and you'll see
> plenty of little sparks where the local field
> exceeds the limit.
-----
Hmm..I've put once a very thin wire to ~6000 V terminal
end of a  transformer (frequency 50 Hz).
Expected to see a tiny corona discharge from ends of
the wire becouse of E>>30 kV/cm.
To my surprise,no corona I could notice per see.
Even in a complete dark I was unable to detect any of
it..I thought the transformer was dead or
something,but it wasn't.
Maybe the corona is also a voltage thing when it comes
to lower potentials and industrial frequencies?I would
say some form of  discharges exist in such cases but
humans can't detect them by their senses.
What do you think ?

Regards,
Boris