🚀 go-pugleaf

In article <phfrom.218@nyx.uni-konstanz.de> I wrote:

[..]

>In principle, it is not guaranteed a priori that the field generating 
>"active" gravit'l mass *M* which occurs in the gravit'l field eq 
[..]
>is identical to the interaction perceiving "passive" gravit'l mass *m* 
>appearing in the force eq/momentum law 
[..]

>This feature is identical in theories involving charges 
>(e.g. electromagnetism, electro-weak theory, chromo dynamics, or thelike;
>just put M -> Q, m -> q for the e.m. case.)
>It results from the simple fact that the gravit'l mass is, from the 
>theoretical point of view, the charge corresponding to gravit'l interaction,
>i.e. gravit'l charge.

To avoid confusion, this needs some explaination: 

In a theory of interaction which couples to some charge (EM..), it is also
not clear a priori it the "active" field generating charge (source) in the
field eq is identical to the "passive" interaction percieving charge
(the "object" of interaction), but, as in the case of gravity, the identity
is established by founding the theory on a variational principle/Lagrangian.

Hope this blows away the cloud I might have generated.
--
 Hartmut Frommert, LS Dehnen, Physics, | E-Mail: <phfrom@dknkurz1.bitnet>
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