Understanding Total Internal Reflection

What happens to light when it moves from a material with a higher index of refraction to a lower one?

• It travels in a straight line.

• It gets absorbed by the material.

• It bends away from the normal.

• It bends towards the normal.

What is the critical angle in the context of total internal reflection?

• The angle of incidence that results in maximum refraction.

• The angle of refraction that results in total absorption.

• The angle of incidence that results in an angle of refraction of 90 degrees.

• The angle of incidence that results in no refraction.

When does total internal reflection occur?

• When light moves from a lower to a higher index of refraction.

• When the angle of refraction is less than 90 degrees.

• When the angle of refraction is 90 degrees or greater.

• When light is absorbed by the new material.

How can the critical angle be calculated using Snell's Law?

• By multiplying the indices of refraction.

• By taking the inverse sine of the ratio of the second index of refraction to the first.

• By finding the sine of the angle of refraction.

• By subtracting the first index of refraction from the second.

Why does the critical angle not work when the second index of refraction is greater than the first?

• Because the sine value cannot exceed 1.

• Because the light travels in a straight line.

• Because light is absorbed by the new material.

• Because the angle of incidence becomes zero.