In the derivation, what geometric relationship is used to express the angle of refraction (r)? - OPTICS Quiz | GKFix.in

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Question

In the derivation, what geometric relationship is used to express the angle of refraction (r)?

A. r = MN/MC - MN/MI
B. r = MN/MC + MN/MI
C. r = MN/MI - MN/MC
D. r = MC/MN - MI/MN