Are point particles really pointless?

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Offline yor_on

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Are point particles really pointless?
« on: 17/12/2010 16:55:52 »
What forces can point particles have, and?
where do they (what 'direction(s') do they point?

Like light can have a spin that can be split in ..
And a polarization that can be split in ..
and a electric 'field' that ??
and a magnetic,  perpendicular to ..

And a electron can have a spin,  that you can split in
And a electric charge
And ..

How many do they have, and well, why?


What do you think?


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Offline QuantumClue

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Are point particles really pointless?
« Reply #1 on: 17/12/2010 17:24:53 »
It seems that this question is related somewhat to my question recently on the dimensions of particle. I don't have an answer, other than the normal textbook stuff, and the spin-related cocnerns I had in a seperate thread. Maybe someone else has a more definitive answer.

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Offline graham.d

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Are point particles really pointless?
« Reply #2 on: 19/12/2010 13:35:31 »
Point particles make the maths a whole lot easier.

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Offline lightarrow

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Are point particles really pointless?
« Reply #3 on: 20/12/2010 16:58:06 »
Point particles make the maths a whole lot easier.
Yes. Excepting when we try to investigate what happens in a region of space very close to the particle, of course...