Content Analysis: ... would be N2 and then sine of theta

Photo Gallery

Chapter 26, Example #2 (Inside your eyeball)
Lesson 26 : Example 2
Chapter 26, Refraction of Light
Chapter 26, Total Internal Reflection
Chapter 26, Example #6 (Combination of thin lens)
Chapter 26, Example #3 (Prism)
Chapter 26, Example #1 (Snell's Law)
Chapter 26 Section 2 Lecture
Chapter 26 Ex 2