[Phys-L] Re: Looking for electricity demo apparatus

[John Denker <jsd@AV8N.COM>]

On 03/17/05 11:35, Karl Trappe wrote:
> Check with Cliff Bettis at Nebraska.  He wrote an article

Like where, man?

I got no relevant hits from
   http://www.google.com/search?q=bettis+spark-coil

> on spark
> coil radiation that's enough to scare your pants off!  He was the
> radiation safety officer for his department, and had to ban his own
> lecture demo apparatus.

Did he actually measure it?  I'm surprised, unless there's
a pretty decent vacuum involved.  I would have thought the
V=IR drop would greatly de-energize the electrons as they
go through the air.

> I think the high frequency nature of the hand
> held tesla gets around the danger.

What's the mechanism whereby frequency affects this sort
of Xray production?
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