Worksheet: Image Production Using Lenses

In this worksheet, we will practice defining the focal length of a lens and describing how light passes through convex and concave lenses forming real and virtual images.

Q1:

A convex lens is used to make a magnified virtual image of an object, as shown in the diagram. What is the magnification produced by the lens?

  • A 1 6 𝑥
  • B 2 0 𝑥
  • C 1 𝑥
  • D 8 𝑥
  • E 2 . 5 𝑥

Q2:

A lens is used to produce a real image that is smaller than the object that produced it. Which of the following statements about the distance between the lens and the object is true?

  • AThe distance from the object to the lens is less than twice the lens’s focal length but is at least as far as the lens’s focal length.
  • BThe distance from the object to the lens is twice the lens’s focal length.
  • CThe distance from the object to the lens is less than the lens’s focal length.
  • DThe distance from the object to the lens is more than twice the lens’s focal length.

Q3:

Which of the following statements is a correct statement about virtual images?

  • AA virtual image can be projected on a screen.
  • BA virtual image is inverted compared to the object that it is an image of.
  • CA virtual image is produced on the side of a lens opposite to the object that produces the image.
  • DA virtual image can be produced by a convex lens and by a concave lens.

Q4:

A convex lens is used to produce a virtual image. Which of the following statements about the distance between the lens and the object is true?

  • AThe distance from the object to the lens is twice the lens’s focal length.
  • BThe distance from the object to the lens is more than twice the lens’s focal length.
  • CThe distance from the object to the lens is less than twice the lens’s focal length but is at least as far as the lens’s focal length.
  • DThe distance from the object to the lens is less than the lens’s focal length.

Q5:

A lens is used to produce a real image that is larger than the object that produced it. Which of the following statements about the distance between the lens and the object is true?

  • AThe distance from the object to the lens is twice the lens’s focal length.
  • BThe distance from the object to the lens is more than twice the lens’s focal length.
  • CThe distance from the object to the lens is less than the lens’s focal length.
  • DThe distance from the object to the lens is less than twice the lens’s focal length but is at least as far as the lens’s focal length.

Q6:

A lens is used to produce a real image that is the same size as the object that produced it. Which of the following statements about the distance between the lens and the object is true?

  • AThe distance from the object to the lens is less than twice the lens’s focal length but is at least as far as the lens’s focal length.
  • BThe distance from the object to the lens is more than twice the lens’s focal length.
  • CThe distance from the object to the lens is less than the lens’s focal length.
  • DThe distance from the object to the lens is twice the lens’s focal length.

Q7:

Which of the following statements is not a correct statement about real images?

  • AA real image can be projected on a screen.
  • BA real image is inverted compared to the object that it is an image of.
  • CA real image is produced on the side of a lens opposite to the object that produces the image.
  • DA real image can be produced by a convex lens and by a concave lens.

Q8:

A convex lens produces a real image that is projected on a screen, and then the screen is moved away from the lens, resulting in a blurred image, as shown in the diagram. Which of the following statements most correctly explains how the image projected onto the screen changes when the screen is moved?

  • AThe image is converted to a virtual image.
  • BThe image becomes faded as light travels further to a more distant screen.
  • CDestructive interference occurs.
  • DEach point on the object is imaged in more than one position on the screen.
  • EThe lens is not perfect.

Q9:

A convex lens is used to produce a real image, as shown in the diagram. What is the focal length of the lens? Answer to one decimal place.

Q10:

A convex lens is used to produce a real image, as shown in the diagram. Which of the points 𝐴 , 𝐵 , 𝐶 , 𝐷 , and 𝐸 is located at a distance from the lens that is equal to the lens’s focal length?

  • A Point 𝐶
  • B Point 𝐴
  • C Point 𝐷
  • D Point 𝐵
  • E Point 𝐸

Q11:

The diagram shows the virtual image of an object produced by a concave lens.

Where in the diagram is the virtual image?

  • AAt point 𝐶
  • BAt point 𝐴
  • CAt point 𝐵

Where in the diagram is the object?

  • AAt point 𝐴
  • BAt point 𝐶
  • CAt point 𝐵

Q12:

Light from an object is incident on a convex lens, as shown. Which of the four diagrams ( 𝐴 ) , ( 𝐵 ) , ( 𝐶 ) , and ( 𝐷 ) most correctly shows how a real image of the object is formed by the lens?

  • A ( 𝐵 )
  • B ( 𝐴 )
  • C ( 𝐷 )
  • D ( 𝐶 )
  • ENone

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