Re: pinhole How is magnetic force carried?

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From: Paul Doherty (pauld@exploratorium.edu)
Date: Wed Jul 09 2003 - 09:54:51 PDT 

Message-Id: <l0311071ebb31f8a96628@[192.168.111.76]>
Date: Wed, 9 Jul 2003 09:54:51 -0700
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole How is magnetic force carried?

Hi Steve

Light is made of photons which have an infinite range.

In the current QED model for magnetism, electric forces and magnetic forces
are both carried by "virtual photon exchange" between particles, they also
have infinite range. Virtual pphotons are strange things,
In the 1870's model for light, light is made up of oscillating electric and
magnetic fields.

Paul D

>OK here is a physics question from a biologist! I was thinking about
>how light is composed of photons. That is that the light we see (and
>any electromagnetic radiation, I believe) travels from one place to
>another as photons. What about magnetism? How is magnetic force
>transferred from place to place? Also, EM radiation can travel quite
>far. Can magnetic force also be transferred over great distances?
>
>Thanks!
>
>Steve
>
>--
>- Steve
>
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>CILS Biology Postdoctoral Fellow
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