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Re: cloud chamber tracks



I knew I left something out, but I didn't know what. :-) Because more
droplets are forming in a larger volume at the far end of the track, the
available gas is shared among more droplets. It therefore takes longer for

individual droplets to grow large enough to be visible.

Vickie

Jeff Radtke wrote:

cut

Stepping through the alpha demonstration,
I just noticed that some tracks form first at the end away from the
source.


Am I missing something or are the above contradictions?

Vickie' theory would imply that very fast (heavy) Beta's will not show this
effect while Alpha's will.

bc


Jeff Radtke
http://www.cloudchambers.com

Wolfgang Rueckner wrote:

If you observe the formation of cloud chamber tracks, it appears that
the track "grows" in the direction of motion of the charged particle
that caused it. Here's my question: Since these are high speed
particles and traverse the cloud chamber in what must be microseconds
or less, why doesn't the entire track appear simultaneously? Why
does it (at least appear to) get seeded at one end and grow in the
direction of the particle motion on a time scale of milliseconds or
longer? Wolfgang