Question: Show analytically that a beam (in a medium of index n 1 ) entering a planar transparent plate (of index n 2 and thickness d
Show analytically that a beam (in a medium of index n1) entering a planar transparent plate (of index n2and thickness d ), as in Fig. P.4.38, emerges parallel to its initial direction. Derive an expression for the lateral displacement (α) of the beam. Incidentally, the incoming and outgoing rays would be parallel even for a stack of plates of different material.
Fig. P.4.38

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