The Index of Refraction of a Certain Medium Is 1

Multiple Choice

The index of refraction of a certain medium is 1.5. What is the speed of light in that medium?

A) 5.0 × 10⁸ m/s
B) 1.0 × 10⁸ m/s
C) 3.0 × 10⁸ m/s
D) 4.0 × 10⁸ m/s
E) 2.0 × 10⁸ m/s