Question 1

A particular material has an index of refraction of 1.25. What percent of the speed of light in a vacuum is the speed of light in the material?

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Question 2

An object 30 cm in front of a concave spherical mirror (f = 10 cm) is moved toward the mirror until it is 20 cm from it. Sketch ray diagrams for these cases and estimate the factor by which the image magnification changes.

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Question 3

A(n) ______________ image cannot be focused on a screen.

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Question 4

A person who can clearly see nearby objects but not distant ones is ______________.

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Question 5

Unlike spherical mirrors, spherical lenses do not have a focal length equal to ______________.

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Question 6

The speed of light in diamond is 1.24 × 10⁸m/s. What is the index of refraction of diamond?

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Question 7

The photoreceptors responsible for color vision are called ______________.

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Question 8

The image of a convex mirror is always virtual, ______________, and smaller.

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Question 9

A lens that is thicker at the center than at the edge is called a(n) ______________ lens.

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Question 10

The waveform of interfering waves is described by the principle of ______________.

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Question 11

A(n) ______________ image is defined as one that can be brought to a focus on a screen.

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Question 12

A plane mirror stands vertically on a table. A ruler lies on the table in such a position as to make an angle of 30° with the mirror. Determine the angle between the ruler and its image.

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Question 13

A simple magnifying glass has a focal length of 6.0 cm. An object is placed 4.0 cm from it. Sketch a ray diagram and give the characteristics of the image.

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Question 14

A double convex lens has a focal length of 0.10 m. An object 0.05 m high is placed 0.15 m from the lens surface on the principal axis. Sketch a ray diagram and give the characteristics of the image.

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Question 15

When an object is inside the focal point of a concave mirror, a(n) ______________ image always results.

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Question 16

The speed of light in a particular transparent medium is 5/8 the speed of light in a vacuum. What is the index of refraction of the material?

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Question 17

For normal vision, an object can be seen clearly when it is beyond the ______________.

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Quiz 7: Optics and Wave Effects