Re: Mysterious Streamers (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- 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