Question 1

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 D

Question 2

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 above 
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 above E

Question 3

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 B

Question 4

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

Question 5

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)  5 ft 
B)  10 ft 
C)  2.5 ft 
D)  3.54 ft 
E)  no 
A)  5 ft 
B)  10 ft 
C)  2.5 ft 
D)  3.54 ft 
E)  no

Question 6

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

Accepted Answer

A)  100 cm 
B)  150 cm 
C)  200 cm 
D)  zero 
E)  50 cm 
A)  100 cm 
B)  150 cm 
C)  200 cm 
D)  zero 
E)  50 cm

Question 7

In a two lens microscope, the intermediate image is:

Accepted Answer

A)  virtual, erect and magnified 
B)  real, erect and magnified 
C)  real, inverted and magnified 
D)  virtual, inverted and reduced 
E)  virtual, inverted and magnified 
A)  virtual, erect and magnified 
B)  real, erect and magnified 
C)  real, inverted and magnified 
D)  virtual, inverted and reduced 
E)  virtual, inverted and magnified

Question 8

Real images formed by a spherical mirror are always:

Accepted Answer

A)  on the side of the mirror opposite the source 
B)  on the same side of the mirror as the source but closer to the mirror than the source 
C)  on the same side of the mirror as the source but closer to the mirror than the focal point 
D)  on the same side of the mirror as the source but further from the mirror than the focal point 
E)  none of the above 
A)  on the side of the mirror opposite the source 
B)  on the same side of the mirror as the source but closer to the mirror than the source 
C)  on the same side of the mirror as the source but closer to the mirror than the focal point 
D)  on the same side of the mirror as the source but further from the mirror than the focal point 
E)  none of the above

Question 9

In a cinema, a picture 2.5 cm wide on the film is projected to an image 3.0 m wide on a screen which is 18 m away. The focal length of the lens is about:

Accepted Answer

A)  7.5 cm 
B)  10 cm 
C)  12.5 cm 
D)  15 cm 
E)  20 cm 
A)  7.5 cm 
B)  10 cm 
C)  12.5 cm 
D)  15 cm 
E)  20 cm

Question 10

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 11

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 12

A nearsighted person can see clearly only objects within 6 feet of her eye. To see distant objects, she should wear eyeglasses of what type and focal length?

Accepted Answer

A)  diverging, 2.8 m 
B)  diverging, 1.4 m 
C)  converging, 2.8 m 
D)  converging, 1.4 m 
E)  diverging, 0.72 m 
A)  diverging, 2.8 m 
B)  diverging, 1.4 m 
C)  converging, 2.8 m 
D)  converging, 1.4 m 
E)  diverging, 0.72 m

Question 13

Two plane mirrors make an angle of 120 $\degree$ with each other. The maximum number of images of an object placed between them is:

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  more than four 
A)  one 
B)  two 
C)  three 
D)  four 
E)  more than four

Question 14

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 15

When you stand in front of a plane mirror, your image is:

Accepted Answer

A)  real, erect, and smaller than you 
B)  real, erect, and the same size as you 
C)  virtual, erect, and smaller than you 
D)  virtual, erect, and the same size as you 
E)  real, inverted, and the same size as you 
A)  real, erect, and smaller than you 
B)  real, erect, and the same size as you 
C)  virtual, erect, and smaller than you 
D)  virtual, erect, and the same size as you 
E)  real, inverted, and the same size as you

Question 16

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

Accepted Answer

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

Question 17

Which of the following is true of all virtual images?

Accepted Answer

A)  They can be seen but not photographed 
B)  They are ephemeral 
C)  They are smaller than the objects 
D)  They are larger than the objects 
E)  None of the above 
A)  They can be seen but not photographed 
B)  They are ephemeral 
C)  They are smaller than the objects 
D)  They are larger than the objects 
E)  None of the above

Question 18

What type of eyeglasses should a nearsighted person wear?

Accepted Answer

A)  diverging lenses 
B)  bifocal lenses 
C)  converging lenses 
D)  plano-convex lenses 
E)  double convex lenses 
A)  diverging lenses 
B)  bifocal lenses 
C)  converging lenses 
D)  plano-convex lenses 
E)  double convex lenses

Question 19

A camera with a lens of focal length 6.0 cm takes a picture of a 1.4-m man standing 11 m away. The height of the image is about:

Accepted Answer

A)  0.39 cm 
B)  0.77 cm 
C)  1.5 cm 
D)  3.0 cm 
E)  6.0 cm 
A)  0.39 cm 
B)  0.77 cm 
C)  1.5 cm 
D)  3.0 cm 
E)  6.0 cm

Question 20

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/f 
A)  p/i 
B)  i/p 
C)  f/p 
D)  f/i 
E)  i/f

Exam 34: Images

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:

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

A virtual image is one:

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

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

In a two lens microscope, the intermediate image is:

Real images formed by a spherical mirror are always:

In a cinema, a picture 2.5 cm wide on the film is projected to an image 3.0 m wide on a screen which is 18 m away. The focal length of the lens is about:

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

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 nearsighted person can see clearly only objects within 6 feet of her eye. To see distant objects, she should wear eyeglasses of what type and focal length?

Two plane mirrors make an angle of 120 °\degree° with each other. The maximum number of images of an object placed between them is:

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

When you stand in front of a plane mirror, your image is:

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

Which of the following is true of all virtual images?

What type of eyeglasses should a nearsighted person wear?

A camera with a lens of focal length 6.0 cm takes a picture of a 1.4-m man standing 11 m away. The height of the image is about:

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:

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Filters

Two plane mirrors make an angle of 120 $\degree$ with each other. The maximum number of images of an object placed between them is: