The speed of light in material A is 1.25 times as large as it is in material B. What is the ratio of the refractive indices, µA /µB of these materials? A.1.50 B.1.00 C.0.800 D.1.25

The speed of light in material A is 1.25 times as large as it is in material B.  What is the ratio of the refractive indices, µA /µB of these materials?   A.1.50 B.1.00 C.0.800 D.1.25
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D.1.25
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