RE: Cerenkov spectrum question

[Franz Schoenhofer <schoenho@via.at>]

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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