Snell's Law & Total Internal Reflection

What is n₂? Use the image to determine your answer.

What happens to the frequency of a light wave as it propagates from glass into air?

What is the index of refraction of a refractive medium if the angle of incidence in the air is 40 degrees and the angle of refraction is 29 degrees?

What is the index of refraction of a refractive liquid if the angle of incidence in the air is 35 degrees and the angle of refraction is 14 degrees?

If light strikes the surface at a greater angle than the critical angle :

The refractive index of a glass prism is 1.9. Determine its critical angle.

When the angle of refraction is 90 $\degree$  the angle of incidence is called the... 

When angle of incident (i) equals to critical angle (c) if light is traveled from a denser medium to a less dense medium,

What happens to light during total internal reflection?

Fiber optic cables work because of the principle of _____.

_____ cables transmit beams of light without allowing any of the light to escape until it gets to the end of the cable.