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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!paladin.american.edu!gatech!concert!uvaarpa!murdoch!kelvin.seas.Virginia.EDU!crb7q
- From: crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass)
- Subject: Re: Was sononluminescence _already_ solved, or not?
- Message-ID: <1993Jan7.184157.19571@murdoch.acc.Virginia.EDU>
- Keywords: Casimir Effect
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: University of Virginia
- References: <1993Jan6.063633.15257@athena.mit.edu> <1993Jan6.074948.27304@murdoch.acc.Virginia.EDU> <1993Jan7.160035.25521@athena.mit.edu>
- Date: Thu, 7 Jan 1993 18:41:57 GMT
- Lines: 39
-
- In article <1993Jan7.160035.25521@athena.mit.edu> redingtn@athena.mit.edu (Norman H Redington) writes:
- >In article <1993Jan6.074948.27304@murdoch.acc.Virginia.EDU>, crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass) writes:
- >|>
- >|> Just curious. What meaning is assigned to 'the dynamical analogue
- >|> of the Casimir effect'? I don't really see any place for the
- >|> Casimir effect or an analogue in the process. This isn't exactly
- >|> a subtle indication of zero-point energy. Are you sure it
- >|> wasn't a joke?
- >|>
- >
- >Definitely not a joke: Proceedings of the National Academy 89(4091)1992.
-
- Thanks for the reference.
-
- >Incidentally, I can think of a "hand-waving" reason for at once thinking
- >that the Casimir effect might be involved. Although everyone thinks of the
- >static Casimir effect as "a subtle indication of zero-point energy", it's
- >really not so subtle when you think about it: at a certain scale of distances,
- >namely the scale of small water droplets, it's van der Waals and Casimir
- >rather than Newton and Maxwell you have turn to. Now sonoluminescence
- >originates with bubbles right in that size regime, but in a dynamic
- >environment... If only I could think of things like this in advance, I'd
- >be Schwinger!
-
- Unconstrained by experimental results, I can think of at least
- five ways to get light emission from a system, and the Casimir effect
- is not the most obvious, nor seemingly the most plausible. At small
- scales, there are certainly different electromagnetic effects than if one
- envisions hard spheres, but unless one views the electronic levels
- in an atom as an indication of zero-point energy, I think Schwinger
- may be reaching.
-
- Theories are a dime a dozen.
-
- dale bass
- --
- C. R. Bass crb7q@virginia.edu
- Department of Wildebeest
- Transvaal (804) 924-7926
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