Casimir Effect inside a Faraday Cage
andrew.stewart_at_anu.edu.au
Date: 10/22/04
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Date: Fri, 22 Oct 2004 17:40:07 +0000 (UTC)
>Over in another Thread I've been involved in a discussion
>about the Casimir Effect. I'm hoping that posting a
>Question here will help resolve the issue. Thanks in
>advance!
>
>As you probably know, the Casimir effect involves two
>conductive plates placed parallel and very close together.
>A small force is observed, which tends to push the plates
>even closer together. According to this link:
>http://math.ucr.edu/home/baez/physics/Quantum/casimir.html
>the standard explanation for the presence of that force
>involves virtual photons in the vacuum. The above-
>mentioned discussion concerns the effect of ordinary Real
>photons upon the plates. We are, after all, awash in a
>sea of Real photons of just about all the longer
>wavelengths, due to broadcasts around the globe (among
>other things). Obviously they should bounce off the
>plates and contribute to the Casimir Effect. Possibly
>they could explain ALL the Casimir Effect, and then the
>standard explanation would likely be erroneous.
>
>So, has the experiment ever been performed inside a
>Faraday Cage (a metal box, preferably with no openings),
>so that all Real photons would be exluded from the
>vicinity of the two plates? Then, if the Effect occurs,
>only the standard view would explain it. If not, then
>the standard view perhaps should be considered faulty.
>Either result would conclude the above-mentioned
>discussion.
>
>Thanks again! (vnemitz@pinn.net (vernonner3voltazim) )
------------------------
All the measurements of Casimir and dispersion forces that have been
made are likely to have been made inside a Faraday cage (an
enclosure, invariably metallic) to protect the experimental system
from external disturbance. Only if the cage is at a temperature of
zero Kelvin will no "real" photons be present.
Andrew Stewart
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