- #1

quenderin

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## Homework Statement

A point charge Q is at the boundary plane of two infinite, homogeneous dielectrics

with dielectric constants \epsilon_1 and \epsilon_2. Calculate the electric potential, the electric field and the displacement vector at any point in space.

## Homework Equations

## The Attempt at a Solution

Okay. I don't have a real clue of where to begin analytically, but I can guess a solution, namely Phi = 2/(\epsilon_1 + \epsilon_2) Q/r. If I work this out, then D normal to the plane is continuous, and so is E parallel to the plane, and applying Gauss' law on the charge gives the right answer. Does this make sense?