Question

The index of refraction of halite, or rock salt, is 1.54. What is the speed of light in that mineral?

Answer 1

1.94 * 10^8 m/s

Step-by-step explanation:

as n= c/v

so v = c/n where c is the speed of light in vacuum so

v = 3 * 10^8 / 1.54 = 1.94 * 10^8