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## Homework Statement

Use a Gaussian surface and Amperian loop to derive the electrostatic boundary conditions for a polarization field P at an interface between media 1 and 2 with relative permittivities εr1 and εr2.

## Homework Equations

D = ε0E + P,

[itex]\nabla[/itex].P = -ρb

where D is the displacement field, E the electric field and ρb the bound volume charge density.

## The Attempt at a Solution

Lack of a solution is the reason for posting?

Thanks in advance.