Had this question in a test today, :). 1. The problem statement, all variables and given/known data Carbon tetrachloride (n = 1.46) is poured into a container made of crown glass (n = 1.52). What's the speed of light in the liquad? 2. Relevant equations v=c/n 3. The attempt at a solution I just multiplied 1.46 by the speed of light. I wanted to know if this is the correct way to do it, what confused me the most was the 2 index of refraction.