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Consider a uniform plane wave impinging obliquely on an air-to-glass (εr = 4.0) boundary from the...

Consider a uniform plane wave impinging obliquely on an air-to-glass (εr = 4.0) boundary from the air side of the boundary. The boundary is flat and the dielectrics may be considered to be infinite in extent on both sides of the boundary. The incident wave is polarized in the plane of incidence. Find the incident angle for which total absorption takes place. Would this also apply for a wave which is polarized normal to the plane of incidence? If yes, explain why, and if no, explain why.

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