#### Cubic zirconia has an index of refraction of 2.20. What is he critical angle for light going from cubic zirconia into air?

Shubhanan Kulkarni

0

I know the equation: N1(sinĂ¸)=N2(sinĂ¸)

In reviewing for finals and I forgot how to do this problem. I'm confused because none of the angles are given I only the 2 index of refraction numbers. Air = 1. Cubic zirconia = 2.20