[Phys-L] The Meissner Effect Revisited

[Chuck Britton <cvbritton@EARTHLINK.NET>]

ok, was anyone at this meeting or does anyone otherwise have
knowledge of the wisdom of Goodstein in this matter??

Seems to me that if a magnet were dropped toward the open end of a
vertically oriented superconducting tube - that it would approach the
opening and would enter far enough to reduce the KE of the magnet to
zero. At this point the upward levitation force exceeds the downward
gravitational force so the magnet 'bounces' back up. With dissipation
due to air or EM radiation the magnet would settle down at the
opening where the eddy current levitation equals the weight of the
magnet.

(no Meissner Effect used in this consideration)

> p.s. at the same mtng. Ron Brown discussed the conversation among Cal
> Tech greats et al. on the Meissner effect, etc.
>
>
> So, What WOULD Happen If a Magnet Were Dropped Down a Superconducting Tube?
>
> ..... or.....The Meissner Effect Revisited
>
> Ron Brown
> Department of Physics
> Cal Poly San Luis Obispo
>
>
> "Then a surprising answer was offered by Caltech's Goodstein - which
> evoked an immediate and gleeful "Of course!" from Feynman (and I might
> add, from the rest of us as well!). It was like being on hallowed ground
> ..."
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