A scuba diver is wearing a head lamp and looking up at the surface of the water. If the minimum angle to the vertical resulting in total internal reflection is , what is the index of refraction of the water?

A ray of light makes a transition from a sample of benzene to water. What is the minimum angle the light must make with respect the normal in order for the light to be completely reflected back into the sample of benzene?

The index of refraction for water is 1.33 and for benzene is 1.50.

You have a piece of optical wire with a light beam traveling through it surrounded by a liquid with an index of refraction of 1.33. If the index of refraction of the wire is 1.85, what is the critical angle needed to achieve total internal reflection?

What is the critical angle for light traveling from glass to water? Glass has an index of refraction of , while water has .

Suppose that a ray of light passes from a medium with an index of refraction of into another medium with an index of refraction of . If the incident ray is at an angle of with respect to the normal, what is the critical angle?