Static forces and virtual-particle exchange: Difference between revisions

Revision as of 19:06, 19 August 2010

Revision as of 22:13, 19 August 2010

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which has the opposite sign to the Yukawa case.

In the limit of zero [[photon]] mass, the Lagrangian reduces to the Lagrangian for [[electromagnetism]].

:<math>
E =
{a_1 a_2 \over 4 \pi r }
.</math>

Therefore the energy reduces to the potential energy for the Coulomb force and the coefficients <math>a_1 </math> and <math>a_2 </math> are proportional to the electric charge. Unlike the Yukawa case, like bodies, in this electrostatic case, repel each other.

==Magnetostatics: The Darwin interaction==