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

[John Denker <jsd@AV8N.COM>]

In the context of
> > I'm surprised, unless there's
> > a pretty decent vacuum involved.

On 03/17/05 12:19, Karl Trappe wrote:
>   A lot of the
> concern is over stray radiation from the old cathode ray tubes,
> especially when excited by the spark coil, such as the one that
> Leybold used to sell.

OK!  That's enough vacuum.  That's definitely something
worth worrying about.

Until I hear otherwise, I will continue to assume that
ordinary sparks in air aren't a problem.
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