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

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

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