The speed of light in a certain glass is $1.91 imes 10^8 \mathrm{~m} / \mathrm{s}$. What is the re

Question

The speed of light in a certain glass is $1.91 	imes 10^8 \mathrm{~m} / \mathrm{s}$. What is the refractive index of the glass?

Professor PC Thomas Classes · Answer

Refractive index $\mu = \frac{c}{v} = \frac{3 	imes 10^8}{1.91 	imes 10^8} \approx 1.57$.