Re: Mysterious Streamers (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 24 Aug 2007 09:06:49 +0100
From: Chris Rutherford <chrismrutherford@xxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Mysterious Streamers (fwd)

Scot D,

I suppose that also means there were no frickin' laser beams either?

Chris R

On 8/24/07, Tesla list <tesla@xxxxxxxxxx> wrote:
>
>
> ---------- Forwarded message ----------
> Date: Thu, 23 Aug 2007 21:22:15 -0500
> From: BunnyKiller <bunnikillr@xxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Mysterious Streamers (fwd)
>
> Hey Dave...
>
> Think about arc lamp ( sodium vapor, mercury etc... and laser
> applications...) most of which usually include just one diode ( alot
> like MOTs leaving a 60 Hz pulse) a fully rectified would allow the 120Hz
> flash to occur... but then again who knows...  maybe the first half of
> the second  (of the total 1 second time of exposure)  was dedicated
> towards the flash and coil picture and the second half of the exposure
> time caught the 50% of the arc lamps exposure time leaving the 60
> pulses... we could both be right in this situation depending on the
> power supply of the street lamps...
>
> just a thought..
>
> Scot D
>
>
>
> Tesla list wrote:
>
> >---------- Forwarded message ----------
> >Date: Wed, 22 Aug 2007 11:08:03 -0400
> >From: Dave Pierson <davep@xxxxxxxx>
> >To: Tesla list <tesla@xxxxxxxxxx>
> >Subject: Re: Mysterious Streamers (fwd)
> >
> >
> >
> >
> >>So...  the possibility of the situation is ... 4 sodium vapor lamps of
> >>which 3 are in the distance, the flash captures the T-coil, shutter
> >>remains open for X amount of time after the CCD ( or film) records the
> >>initial image. Once the photographer "took" the picture, the camera was
> >>moved towards the right and then upwards with increasing velocity ( thus
> >>causing the spread out flashes in the "streamer" ( which are more than
> >>likely the 60Hz pulses in the street light).
> >>
> >>
> >    Largely concur.  The pulses would be at 120, as both positive &
> >    negative would provide a light peak.
> >
> >    As to the appearance of passing in front of the 'toroid', that could
> >    easily be a 'double exposure' effect.  They can be quite mystifying.
> >
> >    best
> >     dwp
> >
> >
> >
> >
> >
> >
>
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>