Quiz on Total Internal Reflection

What is the critical angle defined as?

• The angle of incidence when light is reflected back

• The angle of incidence in the denser medium when the angle of refraction is 90°

• The angle of refraction when light enters a denser medium

• The angle of incidence that results in total internal reflection

What happens during total internal reflection?

• Light is absorbed by the denser medium

• No light travels into the less dense medium

• Some light is refracted into the less dense medium

• All light travels into the less dense medium

According to Snell's law, what happens as the angle of incidence increases?

• The angle of refraction increases

• The angle of incidence decreases

• The angle of refraction decreases

• The angle of refraction remains constant

What is the relationship between critical angle and refractive index?

• Critical angle is independent of refractive index

• Critical angle increases with increasing refractive index

• Critical angle is equal to refractive index

• Critical angle decreases with increasing refractive index

Which of the following is a natural phenomenon involving total internal reflection?

• Absorption of light by glass

• Refraction of light in water

• Reflection of sound

• Formation of a rainbow

What optical device uses total internal reflection to function?

• Magnifying glass

• Periscope

• Concave mirror

• Convex lens

In the context of optical fibers, what is the role of the outer cladding?

• To absorb light

• To reflect light back into the core

• To refract light

• To increase the diameter of the fiber

What occurs when light travels from a denser medium to a less dense medium?

• It bends towards the normal

• It bends away from the normal

• It is reflected back

• It is completely absorbed

What is the angle of reflection in total internal reflection?

• Always 90°

• Equal to the angle of incidence

• Equal to the critical angle

• Always 0°

What happens to light rays in a mirage?

• They are absorbed by the ground

• They are refracted and then reflected

• They are only refracted

• They are only reflected