From: pauld@exploratorium.edu
Date: Wed Nov 06 2002 - 21:56:35 PST
Message-Id: <200211070556.gA75uXa01957@isaac.exploratorium.edu> From: pauld@exploratorium.edu Subject: Re: pinhole Repulsion, Attraction, etc. Date: Wed, 6 Nov 2002 21:56:33 US/Pacific
Hi Jhumki
Here is the official answer:
Protons and electrons have a property we call "electric charge."
This property has two versions plus and minus and one non version "uncharged"
Like charges repel
unlike charges attract
a charge and an uncharge attract weakly
two uncharged attract very weakly.
These last two rules are seldom taught in high school physics.
The attraction just IS,
It is a fundamental property of nature and there is no "because."
Paul D
> Why do electrons repel each other but an electron and proton attract each
> other? Why does a neutron do neither? Do we know about the structure of
> sub-atomic particles enough to answer these questions?
>
> Thanks,
> Jhumki Basu
>
>
>
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