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"Michael J. Strickland" skrev
news:MCzvk.426$1a2.311@trnddc04
>
> <Louis_N@edu.herlufsholm.dk> wrote in message
> news:37bc1407-57d5-4632-abd5-b3fb37082dd2@w1g2000prk.googlegroups.com...
> Questions:
> - What is the value of the experimentally measured 'radius' of the
> electron?
> - What is the value of the experimentally measured 'radius' of the
> proton?
>
> Best regards
> Louis Nielsen
> Denmark
>
>
> I don't know about the experiemental but I would put an upper limit on
> it
> by assuming it's density is >= that of a proton. You can then calculate
> limits on it from:
>
> m_e / [4/3 pi (r_e)^3] >= m_p / [4/3 pi (r_p)^3]
>
> r_e <= [ (m_e/m_p)^(1/3) ]* r_p
>
> r_e <= {9.109e-31/1.673e-27) * 8.25e-16m
>
> using:
> r_p = 8.25e-16m
> m_p = 1.673e-27 kg
> m_e = 9.109e-31 kg
>
> r_e <= 4.491e-19 m
>
>
>
>
>
> --
> -----------------------------------------------------------------------
> Michael J. Strickland
> Quality Services                           qualityservices2@verizon.net
> 703-560-7380
> -----------------------------------------------------------------------
>

Compare with ...

7705 news:g6b4bd$24o4$1@newsbin.cybercity.dk
>
> > > Electron
> > >     Size < 10^-18 m
> > > ...
> > > Neutron and Proton
> > >     Size (around) 10^-15 m


Smart guy ... :-)

*Where* do You get this information ( r_p = 8.25e-16m ) from ?


And ...

> r_e <= {9.109e-31/1.673e-27) * 8.25e-16m
m_p = 1,67262171(29) � 10^27 kg
m_e = 9,1093826(16) � 10^31 kg


Can someone find the proton-radius better ?


Med venlig hilsen,
Mogens Kall, The servant of Michael, the *fool* of Christ.
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