Re: UV hazards from sparks (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 28 Jun 2007 22:41:59 +0800
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: UV hazards from sparks (fwd)

Unless you are looking at TC sparks like this it probably doesn't matter. 
(but if you do, use UV coated lenses like I did)
http://tesladownunder.com/tesla_coil_sparks.htm#Dalek%20cage
Jacobs ladder is generally low UV and safe.  The inverse square law means 
that TC sparks are well attenuated and unlikely to give corneal UV burns. TC 
sparks in the daytime are not bright unlike welding sparks.
Peter

> ---------- Forwarded message ----------
> Date: Wed, 27 Jun 2007 17:06:04 -0700 (PDT)
> From: Mike Giblin <mike_99_eng@xxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: UV hazards from sparks
>
> Hi folks,
>
>  I know that both rotary and static spark gaps emit enough UV to toast
> one's retinas and that those gaps should always be shielded from view.
> But, how safe is it to look at the sparks from a Tesla Coil?  What about
> gazing at the beautiful sparks and enticing flame from a Jacobs Ladder?
> Do I need special UV attenuating lenses?
>
>  I figured that I better ask the experts (and experts in training) on
> this one rather than learn this lesson the hard way.
>
>  Thanks,
>  Mike Giblin
>
>
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