Re: Sparks - Bright in the middle, how to verify it -suggestion

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>

Hi all

I put a video on the net at this address :
 http://pages.infinit-dot-net/luc2/cheap_coil.mov
It 's on a QuickTime format . You could download the player for free at
this address they make
it for PC too:
 http://www.apple-dot-com/quicktime/download/
You could play with the playing cursor to make it slow or fast. At many
place you see the
phenomena.

Luc Benard

Tesla list wrote:

> Original poster: "bob golding by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <yubba-at-clara-dot-net>
>
> Hi Chuck all,
>     I think those pictures of bullets and humming bird wings all relied on
> the short duration of an electronic
> flash. I agree with Mike H that the problem will be getting enough light
> without killing the contrast and losing
> the spark in the light. I have seen film of arc formation in arc welding
> taken at high speed. This was done at the
> welding institute here in Cambridge. Could be worth asking them how they
> did it. I think they may have changed
> there name by now. It could work with a single shot well controlled coil,
> the problem will be to not fry the
> camera. I will try my digital camera set on Bulb setting with as little
> light as possible and see what happens.
>
> cheers
> bob golding
>
> Tesla list wrote:
>
> > Original poster: "Charles Hobson by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <charles.a.hobson-at-btinternet-dot-com>
> >
> > Hi Matt and all
> >
> > What you saw precisely describes the sparks  I saw at low power.  I
would be
> > interested in any photography of them. There have been many  most
> > interesting responses to the question of sparks being bright in the middle.
> > I think that high speed photography techniques might provide some answers.
> > Back in about 1959 or 60 I went to a symposium on Photography and Lenses in
> > Los Angeles and saw some fascinating motion pictures of bullets and other
> > high speed projectiles. They were astonishing to say the least. (I did
> > manage a hand shake with Wernher von Braun who was there at the time.)  The
> > photo technology is there to take the pictures. The  only problem is
> > getting funding to do it as one of the responses to this phenomena
> > indicated.
> >
> > Cheers   Chuck