On the boundary (surface) of two regions, the tangential components of electric fields on above and below surface are continuous. I wonder if it is also true for displacement [tex]\vec{D}[/tex] and polarization [tex]\vec{P}[/tex]? That is, can I say:(adsbygoogle = window.adsbygoogle || []).push({});

the tangential component of [tex]\vec{D}[/tex] or [tex]\vec{P}[/tex] on above and below surface are continuous?

For magnetic field, the statement of the magnetic field about [tex]\vec{B}[/tex] is:

[tex](\vec{B}_{above} - \vec{B}_{below} )\cdot\hat{n} = 0[/tex]

and

[tex](\vec{B}_{above} - \vec{B}_{below} )\times \hat{n} = \mu_0\vec{K}[/tex]

I wonder if [tex]\vec{K}[/tex] means the free current surface density? What is the boundary conditions for [tex]\vec{H}[/tex]?

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# Boundary condition of EM field

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