Zircon is sometimes used to make fake diamonds. What is its index of refraction if the speed of light in zircon is

Question

1.6 x 10^8 m/s.

Please show all work

Thank you.

Answer 1

N = c/(1.6 x 10^8 m/s.)
= 3.0/1.6
= ?

Answer 2

1.875