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Science Experiments / Re: A home made cloud chamber, and a picture.
« on: 29/04/2013 06:58:24 »... the bull's eye was visible for a fraction of a second--it's only pure chance it was photographed ...
Perhaps the conditions in the cloud chamber which showed the radioactive footprint(s) of the button's previous position(s) only existed momentarily.
Gamma-rays can fog film (and the digital equivalent), but even if you had placed the button on the back of the camera earlier it would produce a circular not elliptical shape.
RD, perhaps I didn't explain myself clearly--but the "button" (an aluminum housing surrounding just 0.9 microcuries of Am-241) never was in that position, especialy within the time frame I carefully pictured above. Nor does this scenario explain why a "footprint" would appear and disappear within one second. But we have already established a mechanism for these short-timeframe events--the ionized trails of charged particles.
What I don't understand is why you want to pursue an explanation for the button as being the cause, simply because it's a vaguely similar shape--yet with no direct causality between these two have been recorded by me or established by this conversation. In fact, the button was never in that position, nor did it ever leave a ghost image nearer to the positions it was pictured--in literally thousands of photos I took to capture trails. As I stated before, since this bulls-eye has similarities to known vapor trails by sub-atomic particles, shouldn't scientific inquiry be directed at a possible particle explanation for this event? To me, that seems to be the most straightforward and logical approach, rather than trying to conform my photographic data to one explanation. Well, that's as much effort I'm going to give on this thread. But if I find a similar event documented somewhere as a plausible explanation, I will update this thread. Cheers.