Question 1

Which of the following is NOT correct for a simple magnifying glass?

Accepted Answer

A)  the image is virtual 
B)  the image is erect 
C)  the image is larger than the object 
D)  the object is inside the focal point 
E)  the lens is diverging 
A)  the image is virtual 
B)  the image is erect 
C)  the image is larger than the object 
D)  the object is inside the focal point 
E)  the lens is diverging

Question 2

Which instrument uses a single converging lens with the object placed just inside the focal point?

Accepted Answer

A)  Camera 
B)  Compound microscope 
C)  Magnifying glass 
D)  Overhead projector 
E)  Telescope 
A)  Camera 
B)  Compound microscope 
C)  Magnifying glass 
D)  Overhead projector 
E)  Telescope

Question 3

The Sun subtends 0.5  $\degree$ as seen from the Earth. Its image, using a 1.0-m focal length lens, is about:

Accepted Answer

A)  10 cm 
B)  2 cm 
C)  1 cm 
D)  5 mm 
E)  1 mm 
A)  10 cm 
B)  2 cm 
C)  1 cm 
D)  5 mm 
E)  1 mm

Question 4

A convex spherical refracting surface separates a medium with index of refraction 2 from air. The image of an object outside the surface is real:

Accepted Answer

A)  always 
B)  never 
C)  only if it is close to the surface 
D)  only if its distance from the surface is large compared to the radius of curvature 
E)  only if the radius of curvature is small 
A)  always 
B)  never 
C)  only if it is close to the surface 
D)  only if its distance from the surface is large compared to the radius of curvature 
E)  only if the radius of curvature is small

Question 5

A virtual image is one:

Accepted Answer

A)  toward which light rays converge but do not pass through 
B)  from which light rays diverge but do not pass through 
C)  from which light rays diverge as they pass through 
D)  toward which light rays converge and pass through 
E)  with a ray normal to a mirror passing through it 
A)  toward which light rays converge but do not pass through 
B)  from which light rays diverge but do not pass through 
C)  from which light rays diverge as they pass through 
D)  toward which light rays converge and pass through 
E)  with a ray normal to a mirror passing through it

Question 6

Consider the following four statements concerning a compound microscope:   Which two of the four statements are correct?

Accepted Answer

A)  I, II 
B)  I, III 
C)  I, IV 
D)  II, III 
E)  II, IV 
A)  I, II 
B)  I, III 
C)  I, IV 
D)  II, III 
E)  II, IV

Question 7

An erect object is located between a concave mirror and its focal point. Its image is:

Accepted Answer

A)  real, erect, and larger than the object 
B)  real, inverted, and larger than the object 
C)  virtual, erect, and larger than the object 
D)  virtual, inverted, and larger than the object 
E)  virtual, erect, and smaller than the object 
A)  real, erect, and larger than the object 
B)  real, inverted, and larger than the object 
C)  virtual, erect, and larger than the object 
D)  virtual, inverted, and larger than the object 
E)  virtual, erect, and smaller than the object

Question 8

The figure shows a concave mirror with a small object located at the point marked 6. If the image is also at this point, then the center of curvature of the mirror is at the point marked:

Accepted Answer

A)  3 
B)  4 
C)  6 
D)  9 
E)  12 
A)  3 
B)  4 
C)  6 
D)  9 
E)  12

Question 9

A converging lens of focal length 20 cm is placed in contact with a diverging lens of focal length 30 cm. The focal length of this combination is:

Accepted Answer

A)  +60 cm 
B)  +25 cm 
C)  +12 cm 
D)  +10 cm 
E)  -10 cm 
A)  +60 cm 
B)  +25 cm 
C)  +12 cm 
D)  +10 cm 
E)  -10 cm

Question 10

A plane mirror is in a vertical plane and is rotating about a vertical axis at 100 rpm. A horizontal beam of light is incident on the mirror. The reflected beam will rotate at:

Accepted Answer

A)  0 rpm 
B)  100 rpm 
C)  141 rpm 
D)  200 rpm 
E)  10,000 rpm 
A)  0 rpm 
B)  100 rpm 
C)  141 rpm 
D)  200 rpm 
E)  10,000 rpm

Question 11

A man holds a rectangular card in front of and parallel to a plane mirror. In order for him to see the entire image of the card, the least mirror area needed is:

Accepted Answer

A)  that of the whole mirror, regardless of its size 
B)  that of the pupil of his eye 
C)  one-half that of the card 
D)  one-fourth that of the card 
E)  an amount which decreases with his distance from the mirror 
A)  that of the whole mirror, regardless of its size 
B)  that of the pupil of his eye 
C)  one-half that of the card 
D)  one-fourth that of the card 
E)  an amount which decreases with his distance from the mirror

Question 12

A man stands with his nose 8 cm from a concave shaving mirror of radius 32 cm. The distance from the mirror to the image of his nose is:

Accepted Answer

A)  8 cm 
B)  12 cm 
C)  16 cm 
D)  24 cm 
E)  32 cm 
A)  8 cm 
B)  12 cm 
C)  16 cm 
D)  24 cm 
E)  32 cm

Question 13

A 3-cm high object is in front of a thin lens. The object distance is 4 cm and the image distance is -8 cm. The image height is:

Accepted Answer

A)  0.5 cm 
B)  1 cm 
C)  1.5 cm 
D)  6 cm 
E)  24 cm 
A)  0.5 cm 
B)  1 cm 
C)  1.5 cm 
D)  6 cm 
E)  24 cm

Question 14

A parallel beam of monochromatic light in air is incident on a plane glass surface. In the glass, the beam:

Accepted Answer

A)  remains parallel 
B)  undergoes dispersion 
C)  becomes diverging 
D)  follows a parabolic path 
E)  becomes converging 
A)  remains parallel 
B)  undergoes dispersion 
C)  becomes diverging 
D)  follows a parabolic path 
E)  becomes converging

Question 15

A plano-convex glass (n = 1.5) lens has a curved side whose radius is 50 cm. If the image size is to be the same as the object size, the object should be placed at a distance from the lens of:

Accepted Answer

A)  50 cm 
B)  100 cm 
C)  200 cm 
D)  340 cm 
E)  400 cm 
A)  50 cm 
B)  100 cm 
C)  200 cm 
D)  340 cm 
E)  400 cm

Question 16

A concave spherical surface with radius r separates a medium with index of refraction 2 from air. As an object in air is moved toward the surface from far away along the central axis, its image:

Accepted Answer

A)  changes from virtual to real when it is a distance r/2 from the surface 
B)  changes from virtual to real when it is a distance 2r from the surface 
C)  changes from real to virtual when it is a distance r/2 from the surface 
D)  changes from real to virtual when it is a distance 2r from the surface 
E)  remains virtual 
A)  changes from virtual to real when it is a distance r/2 from the surface 
B)  changes from virtual to real when it is a distance 2r from the surface 
C)  changes from real to virtual when it is a distance r/2 from the surface 
D)  changes from real to virtual when it is a distance 2r from the surface 
E)  remains virtual

Question 17

A 5.0-ft woman wishes to see a full length image of herself in a plane mirror. The minimum length mirror required is:

Accepted Answer

A)  2.5 ft 
B)  3.54 ft 
C)  5.0 ft 
D)  10 ft 
E)  no single 
A)  2.5 ft 
B)  3.54 ft 
C)  5.0 ft 
D)  10 ft 
E)  no single

Question 18

A candle C sits between two parallel mirrors, a distance 0.2d from mirror 1. Here d is the distance between the mirrors. Multiple images of the candle appear in both mirrors. How far behind mirror 1 are the nearest three images of the candle in that mirror?

Accepted Answer

A)  0.2d, 1.8d, 2.2d 
B)  0.2d, 2.2d, 4.2d 
C)  0.2d, 1.8d, 3.8d 
D)  0.2d, 0.8d, 1.4d 
E)  0.2d, 1.8d, 3.4d 
A)  0.2d, 1.8d, 2.2d 
B)  0.2d, 2.2d, 4.2d 
C)  0.2d, 1.8d, 3.8d 
D)  0.2d, 0.8d, 1.4d 
E)  0.2d, 1.8d, 3.4d

Question 19

An erect object is placed on the central axis of a thin lens, further from the lens than the magnitude of its focal length. The magnification is +0.4. This means:

Accepted Answer

A)  the image is real and erect and the lens is a converging lens 
B)  the image is real and inverted and the lens is a converging lens 
C)  the image is virtual and erect, and the lens is a diverging lens 
D)  the image is virtual and erect, and the lens is a converging lens 
E)  the image is virtual and inverted and the lens is a diverging lens 
A)  the image is real and erect and the lens is a converging lens 
B)  the image is real and inverted and the lens is a converging lens 
C)  the image is virtual and erect, and the lens is a diverging lens 
D)  the image is virtual and erect, and the lens is a converging lens 
E)  the image is virtual and inverted and the lens is a diverging lens

Exam 34: Images

Which of the following is NOT correct for a simple magnifying glass?

Which instrument uses a single converging lens with the object placed just inside the focal point?

The Sun subtends 0.5 °\degree° as seen from the Earth. Its image, using a 1.0-m focal length lens, is about:

A convex spherical refracting surface separates a medium with index of refraction 2 from air. The image of an object outside the surface is real:

A virtual image is one:

Consider the following four statements concerning a compound microscope: Which two of the four statements are correct?

An erect object is located between a concave mirror and its focal point. Its image is:

The figure shows a concave mirror with a small object located at the point marked 6. If the image is also at this point, then the center of curvature of the mirror is at the point marked:

A converging lens of focal length 20 cm is placed in contact with a diverging lens of focal length 30 cm. The focal length of this combination is:

A plane mirror is in a vertical plane and is rotating about a vertical axis at 100 rpm. A horizontal beam of light is incident on the mirror. The reflected beam will rotate at:

A man holds a rectangular card in front of and parallel to a plane mirror. In order for him to see the entire image of the card, the least mirror area needed is:

A man stands with his nose 8 cm from a concave shaving mirror of radius 32 cm. The distance from the mirror to the image of his nose is:

A 3-cm high object is in front of a thin lens. The object distance is 4 cm and the image distance is -8 cm. The image height is:

A parallel beam of monochromatic light in air is incident on a plane glass surface. In the glass, the beam:

A plano-convex glass (n = 1.5) lens has a curved side whose radius is 50 cm. If the image size is to be the same as the object size, the object should be placed at a distance from the lens of:

A concave spherical surface with radius r separates a medium with index of refraction 2 from air. As an object in air is moved toward the surface from far away along the central axis, its image:

A 5.0-ft woman wishes to see a full length image of herself in a plane mirror. The minimum length mirror required is:

A candle C sits between two parallel mirrors, a distance 0.2d from mirror 1. Here d is the distance between the mirrors. Multiple images of the candle appear in both mirrors. How far behind mirror 1 are the nearest three images of the candle in that mirror?

An erect object is placed on the central axis of a thin lens, further from the lens than the magnitude of its focal length. The magnification is +0.4. This means:

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion I

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

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The Kinetic Theory of Gases

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Energy From the Nucleus

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Filters

The Sun subtends 0.5 $\degree$ as seen from the Earth. Its image, using a 1.0-m focal length lens, is about: