AP Physics 2 Optics Review

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.

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NGSS.MS-PS4-2

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.

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NGSS.MS-PS4-2

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

• reflection 
• dispersion
• refraction
• total internal reflection

In the ray diagram below, which line represents the incident ray?

• A

• B

• N

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NGSS.MS-PS4-2

In the ray diagram below, which angle represents the refracted angle?

• A

• B

• C

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NGSS.MS-PS4-2

What is a line drawn at 90° to a surface called?

• incident ray

• normal line

• refracted ray

• tangent

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

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

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NGSS.HS-PS4-1

Light has the lowest speed in which medium? (n= index of refraction)

• diamond

  n=2.45

• water

  n=1.33

• flint glass

  n=1.70

• crown glass

  n=1.523

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.

Tags

NGSS.MS-PS4-2

What direction does the ray bend when entering a more optically dense material, where the wave travels more slowly?

• Towards the normal.

• Away from the normal.

• No change.

• Answer is not listed above.

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NGSS.MS-PS4-2