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3. Region 1 (z<0) contains a dielectric for which &1 = 2.5, while region 2 (z> 0) is
characterized by &2 = 4. Let E, = -30a, + 50ay+ 70a, V/m, find:
a) E2.
b) D2
c) P2.
d) The angle between E, and the normal to the surface.
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