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

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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