Question 1

The eyes of some people wearing glasses appear smaller than normal. The glasses help the people to see

Accepted Answer

A)   better in the dark.
B)   objects that are far away.
C)   objects that are close by.
D)   moving object better.
E)   better in bright lights.F) A) and B)
G) B) and E)

Question 2

The theoretical limit to the sharpness of focus of a lens system is determined by

Accepted Answer

A)   spherical aberration limitations.
B)   chromatic aberration limitations.
C)   astigmatic limitations.
D)   diffraction limitations.
E)   the relative smoothness of the lens surface.F) None of the above
G) A) and E)

Question 3

A jeweler's loupe (magnifying glass)  has a focal length of 2.00 cm. Assuming that the loupe is held so that it forms an image at the normal near point of 25.0 cm, what magnification does it provide?

Accepted Answer

A)   46
B)   54
C)   11.5
D)   50
E)   15.4F) B) and C)
G) None of the above

Question 4

1 = 15 cm and is constructed of a material with refractive index of 1.5. The focal length of the lens is A)  -15 cm B)  15 cm C)  -30 cm D)  30 cm E)  None of these is correct." class="answers-bank-image d-inline" rel="preload" > A plano-concave lens has r1 = 15 cm and is constructed of a material with refractive index of 1.5. The focal length of the lens is

Accepted Answer

A)   -15 cm
B)   15 cm
C)   -30 cm
D)   30 cm
E)   None of these is correct.F) A) and B)
G) A) and E)

Question 5

Two people look at the same object through the same microscope. Person A has a near point of xnp and person B has a near point of 2xnp. If person A sees the object magnified m times, with what magnification does person B see the object?

Accepted Answer

A)   m
B)   m/2
C)   m/4
D)   2m
E)   4mF) A) and E)
G) A) and D)

Question 6

White light falls on a thick lens. The red wavelength and the blue wavelength fall at different focuses. The lens is said to exhibit

Accepted Answer

A)   hypermetropia.
B)   myopia.
C)   astigmatism.
D)   chromatic aberration.
E)   spherical aberration.F) A) and E)
G) All of the above

Question 7

Which type of aberration can be eliminated using mirrors instead of lenses?

Accepted Answer

A)   chromatic aberration
B)   spherical aberration
C)   coma aberration
D)   astigmatism
E)   all the aberrationsF) A) and E)
G) None of the above

Question 8

Your near point is xnp, and you're using a lens of focal length xnp/5 as a simple magnifier. What magnification do you obtain?

Accepted Answer

A)   10
B)   50
C)   0.1
D)   0.2
E)   5F) C) and E)
G) B) and C)

Question 9

A lens of focal length -45 cm is used to correct the vision of a nearsighted person. Where is this person's far point?

Accepted Answer

A)   90 cm
B)   45 cm
C)   25 cm
D)   70 cm
E)   20 cmF) C) and D)
G) A) and E)

Question 10

A positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm. An object is placed 240 cm in front of the negative lens. The final image distance relative to the positive lens is

Accepted Answer

A)   -40 cm
B)   56 cm
C)   -56 cm
D)   80 cm
E)   -80 cmF) B) and C)
G) C) and D)

Question 11

When an object is farther from a convex mirror than the mirror's focal point, the

Accepted Answer

A)   magnification is less than one.
B)   image distance is greater than the object distance.
C)   magnification is equal to one.
D)   image is real.
E)   image is inverted.F) A) and B)
G) All of the above

Question 12

The data in the graph were obtained using a thin lens. The lens must have been a

Accepted Answer

A)   converging lens of focal length 10 cm.
B)   converging lens of focal length 5 cm.
C)   diverging lens of focal length 10 cm.
D)   diverging lens of focal length 5 cm.
E)   flat-plate lens.F) All of the above
G) B) and D)

Question 13

A farsighted person uses glasses to read. The person then sees _____ print that appears _____ than is actually the case.

Accepted Answer

A)   larger; closer
B)   larger; farther away
C)   smaller; closer
D)   smaller; farther away
E)   actual sized; farther awayF) C) and D)
G) B) and D)

Question 14

A double-convex lens is made of glass of index of refraction 1.60. If the radii of curvature of the two surfaces are 10 cm and 20 cm, the focal length of the lens in air is

Accepted Answer

A)   11.1 cm
B)   -11.1 cm
C)   25 cm
D)   33.3 cm
E)   -33.3 cmF) C) and D)
G) D) and E)

Question 15

Suppose your near point is 25.0 cm and you want to obtain a magnifying power of 20 with a simple magnifier. What focal-length lens should you choose?

Accepted Answer

A)   20 cm
B)   25 cm
C)   1.3 cm
D)   1.0 m
E)   80 cmF) B) and E)
G) A) and E)

Question 16

An object is located 3 cm from the surface of a silvered spherical glass Christmas tree ornament that is 3 cm in diameter. The image forms at

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) All of the above
G) A) and D)

Question 17

An object is 10 cm from a concave spherical mirror whose radius is 10 cm. The image is

Accepted Answer

A)   real, inverted, and magnified.
B)   real, inverted, and diminished.
C)   real, inverted, and the same size.
D)   virtual, erect, and magnified.
E)   virtual, erect, and diminished.F) C) and E)
G) A) and B)

Question 18

How far must a man's face be located in front of a concave spherical shaving mirror of radius 120 cm for him to see an erect image of his face four times its real size?

Accepted Answer

A)   -75 cm
B)   45 cm
C)   75 cm
D)   90 cm
E)   150 cmF) B) and E)
G) C) and D)

Question 19

1 and F2, respectively. After passing through the two lenses, the ray passes through point A)  1 B)  2 C)  3 D)  4 E)  5" class="answers-bank-image d-inline" rel="preload" > Thin converging lenses 1 and 2 have focal points F1 and F2, respectively. After passing through the two lenses, the ray passes through point

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) C) and E)
G) A) and E)

Question 20

1/2. The image produced by the lens is A)  inverted, real, and reduced in size. B)  inverted, virtual, and enlarged in size. C)  upright, virtual, and reduced in size. D)  upright, virtual, and enlarged in size. E)  upright, real, and enlarged in size." class="answers-bank-image d-inline" rel="preload" > An object is placed in front of a plano-concave lens at r1/2. The image produced by the lens is

Accepted Answer

A)   inverted, real, and reduced in size.
B)   inverted, virtual, and enlarged in size.
C)   upright, virtual, and reduced in size.
D)   upright, virtual, and enlarged in size.
E)   upright, real, and enlarged in size.F) A) and B)
G) D) and E)

Exam 12: Optical Images

Your near point is x_np, and you're using a lens of focal length x_np/5 as a simple magnifier. What magnification do you obtain?

Correct Answer
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The theoretical limit to the sharpness of focus of a lens system is determined by

Correct Answer
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Correct Answer
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Thin converging lenses 1 and 2 have focal points F₁ and F₂_, respectively. After passing through the two lenses, the ray passes through point

Correct Answer
verified

A jeweler's loupe (magnifying glass) has a focal length of 2.00 cm. Assuming that the loupe is held so that it forms an image at the normal near point of 25.0 cm, what magnification does it provide?

Correct Answer
verified

White light falls on a thick lens. The red wavelength and the blue wavelength fall at different focuses. The lens is said to exhibit

Correct Answer
verified

An object is 10 cm from a concave spherical mirror whose radius is 10 cm. The image is

Correct Answer
verified

An object is placed in front of a plano-concave lens at r₁/2. The image produced by the lens is

Correct Answer
verified

A farsighted person uses glasses to read. The person then sees _ print that appears _ than is actually the case.

Correct Answer
verified

An object is located 3 cm from the surface of a silvered spherical glass Christmas tree ornament that is 3 cm in diameter. The image forms at

Correct Answer
verified

A positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm. An object is placed 240 cm in front of the negative lens. The final image distance relative to the positive lens is

Correct Answer
verified

When an object is farther from a convex mirror than the mirror's focal point, the

Correct Answer
verified

Suppose your near point is 25.0 cm and you want to obtain a magnifying power of 20 with a simple magnifier. What focal-length lens should you choose?

Correct Answer
verified

The data in the graph were obtained using a thin lens. The lens must have been a

Correct Answer
verified

Correct Answer
verified

Which type of aberration can be eliminated using mirrors instead of lenses?

Correct Answer
verified

Two people look at the same object through the same microscope. Person A has a near point of x_np and person B has a near point of 2x_np. If person A sees the object magnified m times, with what magnification does person B see the object?

Correct Answer
verified

A lens of focal length -45 cm is used to correct the vision of a nearsighted person. Where is this person's far point?

Correct Answer
verified

The eyes of some people wearing glasses appear smaller than normal. The glasses help the people to see

Correct Answer
verified

How far must a man's face be located in front of a concave spherical shaving mirror of radius 120 cm for him to see an erect image of his face four times its real size?

Correct Answer
verified

Exam 12: Optical Images

Your near point is xnp, and you're using a lens of focal length xnp/5 as a simple magnifier. What magnification do you obtain?

Correct AnswerverifiedShow Answer

The theoretical limit to the sharpness of focus of a lens system is determined by

Correct AnswerverifiedShow Answer

A plano-concave lens has r1 = 15 cm and is constructed of a material with refractive index of 1.5. The focal length of the lens is

Correct AnswerverifiedShow Answer

Thin converging lenses 1 and 2 have focal points F1 and F2, respectively. After passing through the two lenses, the ray passes through point

Correct AnswerverifiedShow Answer

A jeweler's loupe (magnifying glass) has a focal length of 2.00 cm. Assuming that the loupe is held so that it forms an image at the normal near point of 25.0 cm, what magnification does it provide?

Correct AnswerverifiedShow Answer

White light falls on a thick lens. The red wavelength and the blue wavelength fall at different focuses. The lens is said to exhibit

Correct AnswerverifiedShow Answer

An object is 10 cm from a concave spherical mirror whose radius is 10 cm. The image is

Correct AnswerverifiedShow Answer

An object is placed in front of a plano-concave lens at r1/2. The image produced by the lens is

Correct AnswerverifiedShow Answer

A farsighted person uses glasses to read. The person then sees _____ print that appears _____ than is actually the case.

Correct AnswerverifiedShow Answer

An object is located 3 cm from the surface of a silvered spherical glass Christmas tree ornament that is 3 cm in diameter. The image forms at

Correct AnswerverifiedShow Answer

A positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm. An object is placed 240 cm in front of the negative lens. The final image distance relative to the positive lens is

Correct AnswerverifiedShow Answer

When an object is farther from a convex mirror than the mirror's focal point, the

Correct AnswerverifiedShow Answer

Suppose your near point is 25.0 cm and you want to obtain a magnifying power of 20 with a simple magnifier. What focal-length lens should you choose?

Correct AnswerverifiedShow Answer

The data in the graph were obtained using a thin lens. The lens must have been a

Correct AnswerverifiedShow Answer

A double-convex lens is made of glass of index of refraction 1.60. If the radii of curvature of the two surfaces are 10 cm and 20 cm, the focal length of the lens in air is

Correct AnswerverifiedShow Answer

Which type of aberration can be eliminated using mirrors instead of lenses?

Correct AnswerverifiedShow Answer

Two people look at the same object through the same microscope. Person A has a near point of xnp and person B has a near point of 2xnp. If person A sees the object magnified m times, with what magnification does person B see the object?

Correct AnswerverifiedShow Answer

A lens of focal length -45 cm is used to correct the vision of a nearsighted person. Where is this person's far point?

Correct AnswerverifiedShow Answer

The eyes of some people wearing glasses appear smaller than normal. The glasses help the people to see

Correct AnswerverifiedShow Answer

How far must a man's face be located in front of a concave spherical shaving mirror of radius 120 cm for him to see an erect image of his face four times its real size?

Correct AnswerverifiedShow Answer

Your near point is x_np, and you're using a lens of focal length x_np/5 as a simple magnifier. What magnification do you obtain?

Correct Answer
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Correct Answer
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Correct Answer
verified

Thin converging lenses 1 and 2 have focal points F₁ and F₂_, respectively. After passing through the two lenses, the ray passes through point

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An object is placed in front of a plano-concave lens at r₁/2. The image produced by the lens is

Correct Answer
verified

A farsighted person uses glasses to read. The person then sees _ print that appears _ than is actually the case.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Two people look at the same object through the same microscope. Person A has a near point of x_np and person B has a near point of 2x_np. If person A sees the object magnified m times, with what magnification does person B see the object?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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