Article View: sci.misc
Article #728Re: differences between sound and light waves?
From: J. Eric Grove
Date: Tue, 23 Feb 1988 17:41
Date: Tue, 23 Feb 1988 17:41
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1252 bytes
In article <3129@bloom-beacon.MIT.EDU> jfc@athena.mit.edu (John F Carr) writes: >The blue glow is the result of massive (i.e., not massless) >particles losing energy as they slow to the speed of light in water. > > > --John Carr (jfc@ATHENA.MIT.EDU) Note that this statement is misleading. Charged particles lose about 3 orders of magnitude more energy in ionizing the medium they are traversing than in generating Cerenkov radiation. Typical ionization energy losses for relativistic particles are ~2*Z*Z MeVcm2/g, while typical energy losses to Cerenkov radiation are ~Z*Z keVcm2/g. Mr. C's radiation is only a minor player in energy loss. J. Eric Grove jeric@tybalt.caltech.edu ...rutgers!cit-vax!tybalt.caltech.edu!jeric
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arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ukma!gatech!hao!ames!elroy!cit-vax!tybalt.caltech.edu!jericShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ukma!gatech!hao!ames!elroy!cit-vax!tybalt.caltech.edu!jeric From: jeric@tybalt.caltech.edu (J. Eric Grove) Newsgroups: sci.misc,sci.physics Subject: Re: differences between sound and light waves? Message-ID: <5537@cit-vax.Caltech.Edu> Date: 23 Feb 88 17:41:53 GMT Sender: news@cit-vax.Caltech.Edu Reply-To: jeric@tybalt.caltech.edu.UUCP (J. Eric Grove) Organization: California Institute of Technology Lines: 18