Re: The mass value of the electron-volt

On Tue, 4 Nov 2003, Stephen Bint wrote:

> "Jon Bell" <[EMAIL PROTECTED]> wrote:
> > Stephen Bint <[EMAIL PROTECTED]> wrote:
> > >I have been trying to find out how the mass value of an electron volt was
> > >determined, without any luck.

[cut]

Just adding:

AFAIK, the theory came first (Einstein, Ann. Phys. 18, p.639, 1905, you 
might be able to find an English version on www) and experimental 
measurements came later. Some of the early experiments were largely 
qualitative, showing that energy could be transformed into mass (pair 
production) and vice versa, but there is no lack of accurate quantitative 
measurements, mainly involving nuclear physics, radioactivity, and 
behaviour of fast particles in accelerators.

-- 
Timo Nieminen - Home page: http://www.physics.uq.edu.au/people/nieminen/
Shrine to Spirits: http://www.users.bigpond.com/timo_nieminen/spirits.html