The refractive index of a medium is defined as the ratio of the speed of light in vacuum to the:
Q1. The refractive index of a medium is defined as the ratio of the speed of light in vacuum to the:
Answer: Speed of light in that medium
Explanation: The refractive index (n) of a medium is defined as the ratio of the speed of light in a vacuum (c) to the speed of light in that medium (v): n = c/v. A higher refractive index means light travels more slowly in the medium and bends more upon entering it.