The surface separating two dielectrics

The surface separating two dielectrics




The surface separating two dielectrics K1 and K2 has a surface charge density ?. The electric intensities on the two sides of the boundary are E1 and E2, making angles ?1 and ?2 with the common normal. Prove that



K2 cot ?2 = K1 cot ?1 (1 – ?/?0 K1E1 cos ?1)





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