AnswersPhysical ScienceRefraction and Lenses

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1
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Samantha is viewing a real image formed by a lens of a diamond ring. Which must be true about the image?

A
It is larger than the actual ring.
B
It could not be captured on film.
C
It is upside down.
D
It was formed by a concave lens.
2
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Olaf takes a picture of his dog using a digital camera. Which is true regarding the image of the dog detected by sensors in the camera?

A
It can only be seen when the camera lens is very close to the dog.
B
It can only be seen from the same side of the lens as the dog.
C
It forms where light rays coming from the dog converge.
D
It forms where light rays coming from the camera spread apart.
4

Cleo stated that light travels through air in straight paths, and when it moves from air to water, light changes direction, speeds up, and bends toward the normal. Which statement best describes Cleo’s mistake?

A
Light bends away from the normal when it moves from air into water.
B
Light travels through air and water in angled, scattered paths.
C
Light slows down when it moves from air into water.
D
Light does not change direction when it moves from air into water.
5

When parallel light rays exit a concave lens, the light rays

A
come together.
B
diverge.
C
converge.
D
remain parallel.
6

Which describes an image that can be produced by a concave lens?

A
The image is real and larger than the object.
B
The image is virtual and smaller than the object.
C
The image is virtual and larger than the object.
D
The image is real and smaller than the object.
7

Danny drew a ray diagram to show the image of a plastic bottle produced by a concave lens. Which describes how the bottle should appear in the diagram?

A
The image of the bottle should appear larger than the actual bottle.
B
The actual bottle should appear larger than the image of the bottle.
C
The actual bottle should be upside down compared to the image of the bottle.
D
The image of the bottle should be upside down compared to the actual bottle.
9

Different kinds of lenses are used in eyeglasses to help people with eye conditions. Farsightedness is an eye condition in which distant objects appear clear but close objects appear blurry. Nearsightedness is an eye condition in which close objects appear clear but distant objects appear blurry. Which best describes the type of lens that would help someone with one of these eye conditions?

A
Concave lenses would help someone who is nearsighted because the lenses make objects look smaller and closer.
B
Convex lenses would help someone who is nearsighted because the lenses can make objects look larger and farther away.
C
Convex lenses would help someone who is nearsighted because the lenses can make objects look smaller and closer.
D
Concave lenses would help someone who is farsighted because the lenses make objects look smaller and closer.
10

Which color of white light bends the most when it is refracted by a prism?

A
orange
B
yellow
C
green
D
red

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