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The constant value of sin(i)/sin(r) for a given pair of media is called the

Question
The constant value of sin(i)/sin(r) for a given pair of media is called the
focal length
refractive index of the second medium with respect to the first
magnification
aperture ratio
Answer
refractive index of the second medium with respect to the first
Detailed Explanation
This constant is defined in the chapter as the refractive index of the second medium with respect to the first.
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