Question 1

A convex refracting surface has a radius of 12 cm. Light is incident in air (n = 1)  and refracted into a medium with an index of refraction of 2. Light incident parallel to the central axis is focused at a point:

Accepted Answer

A)   3 cm from the surface
B)   6 cm from the surface
C)   12 cm from the surface
D)   18 cm from the surface
E)   24 cm from the surfaceF) A) and B)
G) A) and E)

Question 2

Which of the following is true of all virtual images?

Accepted Answer

A)   They can be seen but not photographed
B)   They appear only briefly
C)   They are smaller than the objects
D)   They are larger than the objects
E)   None of the aboveF) B) and D)
G) A) and D)

Question 3

A concave spherical mirror has a focal length of 12 cm. If an erect object is placed 6 cm in front of it:

Accepted Answer

A)   the magnification is 2 and the image is erect
B)   the magnification is 2 and the image is inverted
C)   the magnification is 0.67 and the image is erect
D)   the magnification is 0.67 and the image is inverted
E)   the magnification is 0.5 and the image is erectF) C) and E)
G) A) and E)

Question 4

The two lenses shown are illuminated by a beam of parallel light from the left. Lens B is then moved slowly toward lens A. The beam emerging from lens B is:

Accepted Answer

A)   initially parallel and then diverging
B)   always diverging
C)   initially converging and finally parallel
D)   always parallel
E)   initially converging and finally divergingF) A) and E)
G) B) and D)

Question 5

The bellows of an adjustable camera can be extended so that the largest film to lens distance is one and one-half times the focal length. If the focal length is 12 cm, the nearest object which can be sharply focused on the film must be what distance from the lens?

Accepted Answer

A)   12 cm
B)   24 cm
C)   36 cm
D)   48 cm
E)   72 cmF) B) and C)
G) C) and E)

Question 6

An erect object placed outside the focal point of a converging lens will produce an image that is:

Accepted Answer

A)   erect and virtual
B)   inverted and virtual
C)   erect and real
D)   inverted and real
E)   impossible to locateF) B) and C)
G) All of the above

Question 7

As an object is moved from a distant location toward the center of curvature of a concave mirror its image:

Accepted Answer

A)   remains virtual and becomes smaller
B)   remains virtual and becomes larger
C)   remains real and becomes smaller
D)   remains real and becomes larger
E)   changes from real to virtualF) None of the above
G) C) and E)

Question 8

When a single-lens camera is focused on a distant object, the lens-to-film distance is found to be 40.0 mm. To focus on an object 0.540 m in front of the lens, the film-to-lens distance should be:

Accepted Answer

A)   36.8 mm
B)   37.3 mm
C)   40.0 mm
D)   42.7 mm
E)   43.2 mmF) A) and B)
G) C) and E)

Question 9

A ball is held 50 cm in front of a plane mirror. The distance between the ball and its image is:

Accepted Answer

A)   0 cm
B)   50 cm
C)   100 cm
D)   150 cm
E)   200 cmF) A) and E)
G) A) and D) C

Question 10

Which of the following five glass lenses is a diverging lens?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) C) and D)
G) D) and E) A

Question 11

A concave spherical mirror has a focal length of 12 cm. If an object is placed 18 cm in front of it the image position is:

Accepted Answer

A)   7.2 cm behind the mirror
B)   7.2 cm in front of the mirror
C)   36 cm behind the mirror
D)   36 cm in front of the mirror
E)   at infinityF) C) and D)
G) D) and E)

Question 12

In a compound microscope, the objective has a focal length of 1.0 cm, the eyepiece has a focal length of 2.0 cm, and the tube length is 25 cm. What is the magnitude of the overall magnification of the microscope?

Accepted Answer

A)   25
B)   50
C)   100
D)   250
E)   310F) None of the above
G) All of the above

Question 13

A concave mirror forms a real image which is twice the size of the object. If the object is 20 cm from the mirror, the radius of curvature of the mirror must be about:

Accepted Answer

A)   13 cm
B)   20 cm
C)   27 cm
D)   40 cm
E)   80 cmF) None of the above
G) A) and B)

Question 14

A point source is to be used with a concave mirror to produce a beam of parallel light. The source should be placed:

Accepted Answer

A)   as close to the mirror as possible
B)   at the center of curvature
C)   midway between the center of curvature and the focal point
D)   midway between the center of curvature and the mirror
E)   midway between the focal point and the mirrorF) C) and D)
G) A) and B) D

Question 15

An object O, in air, is in front of the concave spherical refracting surface of a piece of glass. Which of the general situations depicted below is like this situation?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) A) and D)
G) B) and E)

Question 16

An object is 30 cm in front of a converging lens of focal length 10 cm. The image is:

Accepted Answer

A)   real and larger than the object
B)   real and the same size than the object
C)   real and smaller than the object
D)   virtual and the same size than the object
E)   virtual and smaller than the objectF) C) and D)
G) A) and C)

Question 17

A magnifying glass has a focal length of 15 cm. If the near point of the eye is 25 cm from the eye the angular magnification of the glass is about:

Accepted Answer

A)   0.067
B)   0.33
C)   0.5
D)   0.67
E)   1.7F) A) and D)
G) B) and C)

Question 18

Let p denote the object-lens distance and i the image-lens distance. The image produced by a lens of focal length f has a height that can be obtained from the object height by multiplying it by:

Accepted Answer

A)   p/i
B)   i/p
C)   f/p
D)   f/i
E)   i/fF) C) and E)
G) A) and B)

Question 19

The image of an erect candle, formed using a convex mirror, is always:

Accepted Answer

A)   virtual, inverted, and smaller than the candle
B)   virtual, inverted, and larger than the candle
C)   virtual, erect, and larger than the candle
D)   virtual, erect, and smaller than the candle
E)   real, erect, and smaller than the candleF) All of the above
G) C) and D)

Question 20

An object is 2 m in front of a plane mirror. Its image is:

Accepted Answer

A)   virtual, inverted, and 2 m behind the mirror
B)   virtual, inverted, and 2 m in front of the mirror
C)   virtual, erect, and 2 m in front of the mirror
D)   real, erect, and 2 m behind the mirror
E)   none of the aboveF) A) and B)
G) B) and C)

Exam 34: Images

A convex refracting surface has a radius of 12 cm. Light is incident in air (n = 1) and refracted into a medium with an index of refraction of 2. Light incident parallel to the central axis is focused at a point:

Correct Answer
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Which of the following is true of all virtual images?

Correct Answer
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A concave spherical mirror has a focal length of 12 cm. If an erect object is placed 6 cm in front of it:

Correct Answer
verified

The two lenses shown are illuminated by a beam of parallel light from the left. Lens B is then moved slowly toward lens A. The beam emerging from lens B is:

Correct Answer
verified

The bellows of an adjustable camera can be extended so that the largest film to lens distance is one and one-half times the focal length. If the focal length is 12 cm, the nearest object which can be sharply focused on the film must be what distance from the lens?

Correct Answer
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An erect object placed outside the focal point of a converging lens will produce an image that is:

Correct Answer
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As an object is moved from a distant location toward the center of curvature of a concave mirror its image:

Correct Answer
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When a single-lens camera is focused on a distant object, the lens-to-film distance is found to be 40.0 mm. To focus on an object 0.540 m in front of the lens, the film-to-lens distance should be:

Correct Answer
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A ball is held 50 cm in front of a plane mirror. The distance between the ball and its image is:

Correct Answer
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C

Which of the following five glass lenses is a diverging lens?

Correct Answer
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A

A concave spherical mirror has a focal length of 12 cm. If an object is placed 18 cm in front of it the image position is:

Correct Answer
verified

In a compound microscope, the objective has a focal length of 1.0 cm, the eyepiece has a focal length of 2.0 cm, and the tube length is 25 cm. What is the magnitude of the overall magnification of the microscope?

Correct Answer
verified

A concave mirror forms a real image which is twice the size of the object. If the object is 20 cm from the mirror, the radius of curvature of the mirror must be about:

Correct Answer
verified

A point source is to be used with a concave mirror to produce a beam of parallel light. The source should be placed:

Correct Answer
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D

Correct Answer
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An object is 30 cm in front of a converging lens of focal length 10 cm. The image is:

Correct Answer
verified

A magnifying glass has a focal length of 15 cm. If the near point of the eye is 25 cm from the eye the angular magnification of the glass is about:

Correct Answer
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Let p denote the object-lens distance and i the image-lens distance. The image produced by a lens of focal length f has a height that can be obtained from the object height by multiplying it by:

Correct Answer
verified

The image of an erect candle, formed using a convex mirror, is always:

Correct Answer
verified

An object is 2 m in front of a plane mirror. Its image is:

Correct Answer
verified

Exam 34: Images

A convex refracting surface has a radius of 12 cm. Light is incident in air (n = 1) and refracted into a medium with an index of refraction of 2. Light incident parallel to the central axis is focused at a point:

Correct AnswerverifiedShow Answer

Which of the following is true of all virtual images?

Correct AnswerverifiedShow Answer

A concave spherical mirror has a focal length of 12 cm. If an erect object is placed 6 cm in front of it:

Correct AnswerverifiedShow Answer

The two lenses shown are illuminated by a beam of parallel light from the left. Lens B is then moved slowly toward lens A. The beam emerging from lens B is:

Correct AnswerverifiedShow Answer

The bellows of an adjustable camera can be extended so that the largest film to lens distance is one and one-half times the focal length. If the focal length is 12 cm, the nearest object which can be sharply focused on the film must be what distance from the lens?

Correct AnswerverifiedShow Answer

An erect object placed outside the focal point of a converging lens will produce an image that is:

Correct AnswerverifiedShow Answer

As an object is moved from a distant location toward the center of curvature of a concave mirror its image:

Correct AnswerverifiedShow Answer

When a single-lens camera is focused on a distant object, the lens-to-film distance is found to be 40.0 mm. To focus on an object 0.540 m in front of the lens, the film-to-lens distance should be:

Correct AnswerverifiedShow Answer

A ball is held 50 cm in front of a plane mirror. The distance between the ball and its image is:

Correct AnswerverifiedC

Which of the following five glass lenses is a diverging lens?

Correct AnswerverifiedA

A concave spherical mirror has a focal length of 12 cm. If an object is placed 18 cm in front of it the image position is:

Correct AnswerverifiedShow Answer

In a compound microscope, the objective has a focal length of 1.0 cm, the eyepiece has a focal length of 2.0 cm, and the tube length is 25 cm. What is the magnitude of the overall magnification of the microscope?

Correct AnswerverifiedShow Answer

A concave mirror forms a real image which is twice the size of the object. If the object is 20 cm from the mirror, the radius of curvature of the mirror must be about:

Correct AnswerverifiedShow Answer

A point source is to be used with a concave mirror to produce a beam of parallel light. The source should be placed:

Correct AnswerverifiedD

An object O, in air, is in front of the concave spherical refracting surface of a piece of glass. Which of the general situations depicted below is like this situation?

Correct AnswerverifiedShow Answer

An object is 30 cm in front of a converging lens of focal length 10 cm. The image is:

Correct AnswerverifiedShow Answer

A magnifying glass has a focal length of 15 cm. If the near point of the eye is 25 cm from the eye the angular magnification of the glass is about:

Correct AnswerverifiedShow Answer

Let p denote the object-lens distance and i the image-lens distance. The image produced by a lens of focal length f has a height that can be obtained from the object height by multiplying it by:

Correct AnswerverifiedShow Answer

The image of an erect candle, formed using a convex mirror, is always:

Correct AnswerverifiedShow Answer

An object is 2 m in front of a plane mirror. Its image is:

Correct AnswerverifiedShow Answer

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C

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A

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D

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