Re: What's Inside A Neutron???


Y.Porat wrote:
> i am quite sure that the picture in my mind is differnt from yourse~:
>
> i guess you imagine as a particle something like an electron
> or even a bit smaller
> on the other hand waht is in my mind as a 'particle' is ....
> something that is even composing the photon!!!
>
> wiht the order of magnitude of exp-51 Kg!
> di dyou got the difference??
> it is so smalle yet so *abundant* that should look like continuous
>
> yet i think you have to agree with me that nature 'could not afford'
> being so uneconomic (i dont know the righ tword in English)
> as to spread so much of that physics entity that you call 'field'
> everywhere
> i guess methaphorically that supose it would be as you immagine
> then once i woulf pas through an electric field if it is so dence
> i should be cought like in sort of a spider network
> it must be simething less dense and much less continuous
> fo rinstance you surley know the simple experience
> to show th emagnetic 'force lines'
> it is not filling all th espace it is 'descrete' descreted to 'foce
> line'

Well, first of all, the idea of discrete "lines of force" is indeed
misleading to students. They get the idea that there is nothing going
on between the lines of force. I much prefer the 2-D grid view of a
vector field, with little arrows at regular lattice points "sampling"
the field at selected points. It's much easier for students to grasp
this way that the field is *everywhere*.

While you may think it uneconomical for a field to be spread
everywhere, there is a simple test. One can calculate the energy
density stored in a field. Now integrate that energy density *over all
space*, from minus infinity to plus infinity in any dimension if you
like, to calculate the energy stored in the field. Compare this to the
energy extractable from (or invested in) the field, as measured by
dumping it into another form when the field is shut down. Voila, they
agree. (A capacitor dumping its energy into heat in a resistor is a
good example.) This means that the field does indeed extend everywhere
over the continuum.

PD

> th eexperiemnt showes it obviously as gathering of lines separated
> between thenselves
> that leads at least me to the particle concept
> ie particles with such a rapid and constant flow that it 'looks '
> continuous!!
> btw
> th e 'fountain methaphor of particles' is very attractive to me
!!
> but you have to keep inmind that is not a fountain of 'electrons; or
> alike
> but something much much smaller.
> all th e best
> ps my first response above as i sayed was intuitive
>
> (i call intuitition anything that is stored in your life memory...
> but you cant at that moment draw it or even explain it to youself
> it is only later step by step that you can 'rationalise' it )
>
> Y.Porat

.

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