On 10/19/2011 10:13, Kevin Wampler wrote:
> there would be a finite number of "lines" where the field is trapped as
> illustrated in the video.

Yes, but there are an infinite number of *possible* lines, so to speak. 
There isn't a flux line every millimeter, with no ability for the device to 
jump from one flux line to the next that's a millimeter away, in other words.

As long as the finite number of discrete flaws don't move to a different 
strength of field, the device can move freely.

I.e., the confusion seems to be that someone thinks the flux lines are like 
the lines you get sprinkling iron filings around a bar magnet and thinking 
there's no magnetism between the filings.

-- 
Darren New, San Diego CA, USA (PST)
   How come I never get only one kudo?

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