To prove that in case of more than two optically different media sandwiched together, with air on left and air on right, the angle at which light returns to air is independent of the indices of refraction of the interior media.

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Chapter 23, Problem 87QAP

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To prove that in case of more than two optically different media sandwiched together, with air on left and air on right, the angle at which light returns to air is independent of the indices of refraction of the interior media.

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