On 4 m=E4rts, 01:59, Erik Max Francis <m...@[EMAIL PROTECTED]
> wrote:
> Wayne Throop wrote:
> > : Erik Max Francis <m...@[EMAIL PROTECTED]
>
> > : The generator of spacetime curvature, and thus gravity, isn't just
> > : just mass, but stress-energy, which is a tensor of which mass is but
> > : one component, the others being energy, stress, pressure, and so on.
>
> > Could a singularity be considered a "monopole"?
> > But also... does it really make sense to talk about a monopole
> > as something odd and special if there's no dipole?
>
> No it doesn't, hence why I was confused what in the world he was asking
> in the first place :-).
>
But there are gravitomagnetic dipoles. Rotating m***** give rise to
dipole gravitomagnetic field.
> What he really means is "charge," not "monopole." In Newtonian
> mechanics, one can speak of mass as being "gravitational charge."
> "Gravitational monopoles," much less "gravitoelectric" or
> "gravitomagnetic" ones, will result in scrunched eyebrows.
>
> In electromagnetism, there are two sources of charge: electric and
> magnetic. Electric charge is the one we're all familiar with and is
> usually just called, of course, charge. Magnetic charge is called
> poles, but they always show up in equal and opposite pairs, hence
> "dipoles." A hypothetical isolated magnetic charge, or pole, is a
> monopole -- and "monopole" only makes sense if you're talking about some
> kind of field charge that only comes in equal and opposite pairs.
>
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