RE: Cerenkov spectrum question

["North, David" <DNorth@Lifespan.org>]

Very true, and according to my old physics texts (I certainly had to look it
up), the index of refraction is equal to the square-root of the dielectric
constant.
David L. North, Sc.M.
Associate Physicist
Rhode Island Hospital
Providence, RI


> ----------
> From: 	Franz Schoenhofer
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Thursday, January 27, 2000 16:42
> To: 	Multiple recipients of list
> Subject: 	RE: Cerenkov spectrum question
> 
> At 15:09 27.01.2000 -0600, you wrote:
> >Oops, I forgot to sign it.
> >
> >The color is blue for water, about 470 nm; but for any material such as
> air
> >or glass the spectrum actually depends on the dialectric constant of the
> >medium,
> 
> Since Cerenkov light is created when beta particles travel at a speed
> higher than the speed of light in the given medium, (which is always lower
> than the speed of light in vacuum) the spectrum and the minimum energy of
> beta particles which can cause Cerenkov light depends on the refractory
> index of the medium. 
> 
> 
> Franz
> 
> 
> 
> Franz Schoenhofer
> Habicherg. 31/7
> A-1160 Vienna
> Austria
> Tel.: +43-1-495 53 08
> Fax.: same number
> mobile phone: +43-664-338 0 333
> e-mail: schoenho@via.at
> 
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