Question Detail
Question
The index of refraction (n) of a medium is defined as the ratio of what two quantities?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Page 36 defines the index of refraction: 'The index of refraction of the medium is the ratio of the speed of light in vacuum to the speed of light in the medium: n = c/v.'
Hint
Recall that the speed of light in a vacuum, 'c', is the maximum speed.