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Re: Why ARE the sparks blue / purple (fwd)

To: tesla@xxxxxxxxxx
Subject: Re: Why ARE the sparks blue / purple (fwd)
From: "Tesla list" <tesla@xxxxxxxxxx>
Date: Mon, 29 Oct 2007 19:23:23 -0700 (MST)
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---------- Forwarded message ----------
Date: Mon, 29 Oct 2007 08:49:19 -0500
From: Dave Pierson <davep@xxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Why ARE the sparks blue / purple (fwd)

>...cameras are not sensitive to the same freqs as our eyes...
 (rough paraphrase)
  Concur.
  Also works the other way:
    films, and sundry iameg sensors can be sensitive to
    freqs our eys miss.  In Serious phtometeric work, film/whatever
    is carefully calibrated:  

     Cameras may not lie, but they can be confused...

    best
     dwp

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