Refraction Mastery Check

A student placed a pencil in a cup of water. The pencil appears broken because light

• always travels in a straight line.

• bends when it passes through water.

• makes the water in the glass evaporate.

• reflects the pencil on the water's surface.

When light passes at an angle to the normal from one medium into another in which its speed is higher

• it is bent toward the normal.

• it always lies along the normal.

• it is unaffected.

• it is bent away from the normal.

Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

• diamond
• water
• flint glass
• barium glass

How is light affected by an increase in the index of refraction?

• Its frequency increases
• Its frequency decreases
• Its speed increases
• Its speed decreases

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say

Light has the highest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

• diamond
• water
• flint glass
• barium glass

Based on the image, which medium has a larger index of refraction?

• Medium 1 has a larger index of refraction.

• Medium 2 has a larger index of refraction.

• Both mediums have the same index of refraction.

• Cannot be determined.

Swimming pools and the ocean look shallower than they really are due to:

• reflection 
• dispersion
• refraction
• total internal reflection

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say

Why does the lower part of the child appear so much different in size from the upper part?

• The light rays that travel through water and then into air are refracted.
• The light rays that travel through water and then into air are enlarged.
• The light rays that travel through air and then into water are reflected.
• The light rays that travel through air and then into water are reduced.