Refraction and Lenses Quiz

In the figure shown, the light waves change direction as a result of _____.

• diffraction

• reflection

• refraction

• absorption

What is the index of refraction?

• The index of refraction is the color of light passing through a material.
• The index of refraction measures the temperature of a material.
• The index of refraction is a measure of how much light bends when entering a material.
• The index of refraction is the speed of light in a vacuum.

How is the relationship between index of refraction and the speed of light through the medium?

• The index of refraction is directly proportional to the speed of light in the medium.
• The index of refraction has no effect on the speed of light in the medium.
• The index of refraction is equal to the speed of light in the medium.
• The index of refraction is inversely related to the speed of light in the medium.

Which would cause light to bend the most after traveling through air?

• oil

• water

• vacuum

• diamond

When light travels from air to oil, it bends toward the normal.

• True

• False

A lens that is thicker in the middle than at the edges is a ________ lens.

• convex
• aspheric
• biconcave
• concave

If you look through a magnifying glass at an object that is more than one focal length away, the image you see will be ______ than the object.

• upright and larger

• upright and smaller

• inverted and larger

• inverted and smaller

The human eye has two _______ lenses.

• The human eye has two lenses: the pupil and sclera.
• The human eye has one lens: the iris.
• The human eye has three lenses: the cornea, lens, and retina.
• The human eye has two lenses: the cornea and the lens.

Light is focused when it enters the eye through the _____.

• cornea

• iris and pupil

• lens

• retina

What happens to the speed of light as it passes from a medium with a higher index of refraction to one with a lower index of refraction?

• It increases

• It decreases

• It remains the same

• It becomes zero