[Prev][Next][Index][Thread]
Re: BL in TC arcs
At 04:35 PM 10/8/98 -0600, you wrote:
>Original Poster: Richard Hull <rhull-at-richmond.infi-dot-net>
>
>
>
>Tesla List wrote:
>
>> Original Poster: Cabbott Sanders <cabbott-at-cyberis-dot-net>
>> out high above the
>> burning piece of wood, the streamers seemed to be swirling and
>> squiggling into corkscrew-type fields. Have you ever seen this happen?
>> It was very amazing, and I caught it on video tape several times. When
>> i came home and frame by framed the video, you can clearly see the
>> formation of a glowing ball usually when there is a "kink" or spiral
>> squiggle in the arc. This will last a few frames then dissappear. I
>> will post a picture of it as soon as i get my capture card working. Try
>> it!
>>
>> --
>> Cabbott Sanders
>> Salem Oregon
>> Website: http://members.aol-dot-com/cabbotttt
>> Phone 503-390-8992
>> Cel 503-930-9173
>
> Be very careful here. This is often seen in streamers captured on video.
>We have studied these at length and find, like you, they are formed at the
>kinks of streamers. We beleive they are parts of streamers at a turn where
>the streamer moves either towards or away from the observation point at a
>very shallow angle off the line of sight. This shows up a an intensified
>knot in the streamer (which it is not), but instead just an optical effect
>due to light piling up in a small area relative to the line of sight. True
>ball lightning should be free of the streamers and persist over a number of
>frames. This is something we have never seen.
>
>Richard Hull, TCBOR
>
>
Hi All,
I might have a solution to the optical illustion effect created when a kink
moves toward you making it look like Ball lightning. Try putting the
cammera in a position that look down on the coil from above. This whould
cure the effect of the kink moving toward you since the observation will be
above and the kinks seem to move either outward or in a helical pattern.
Something harder is to put two cameras 90 degrees wrt each other. If you
can sink them up you can compare if the ball presist on both in simultanius
frams. This means if it is moving toward one it is moving perpindicular to
the other, thus eliminating the chance for illusion and another explanation
is needed.
Thanks all, just wanted to help.
Dwight
>
>