1 vote

Physical significance of $\vec{w}$ $\times$ $($curl $\vec{v})$

If it helps, the following identity holds (in index notation, where repeated indices are summed over): $$[\vec w\times(\vec \nabla\times\vec v)]_\mu = (\partial_\mu v_\nu - \partial_\nu v_\mu)w_\nu. $$...
1 vote

What is the meaning of screened potential?

why do we need another potential besides the Coulomb one that includes the interaction between every particle in the system? The problem is that we can not solve the problem if we include all the ...
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