Re: Mysterious Streamers (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 25 Aug 2007 21:25:20 -0500
From: BunnyKiller <bunnikillr@xxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Mysterious Streamers (fwd)

Hey Chris..
probably not...   but if I were doing complex Tesla coil and light 
effect photos... there WOULD be at least 2 lasers involverd  :)

SD



Tesla list wrote:

>---------- 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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