What is the refractive index of medium 1 with respect to medium 2 if n₁₂ = 1.2? - OPTICS Quiz | GKFix.in

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Question

What is the refractive index of medium 1 with respect to medium 2 if n₁₂ = 1.2?

A. 1.2
B. 2.1
C. 0.83
D. 1.0