# 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
• B
• C
• D
• E

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 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 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 more than twice the lens’s focal length.

Q3:

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

• AA virtual image is inverted compared to the object that it is an image of.
• BA virtual image can be projected on a screen.
• 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 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.

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 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.

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

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

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 , , , , and is located at a distance from the lens that is equal to the lens’s focal length?

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

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
• BAt point
• CAt point

Where in the diagram is the object?

• AAt point
• BAt point
• CAt point

Q12:

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

• ANone
• B
• C
• D
• E

Q13:

The diagram shows the real and virtual images of an object produced by a convex lens.

Where in the diagram is the real image?

• AAt point
• BAt point
• CAt point
• DAt point
• EAt point

Where in the diagram is the object?

• AAt point
• BAt point
• CAt point
• DAt point
• EAt point

Where in the diagram is the virtual image?

• AAt point
• BAt point
• CAt point
• DAt point
• EAt point

Where in the diagram is the convex lens?

• AAt point
• BAt point
• CAt point
• DAt point
• EAt point

Where in the diagram is the focal point of the convex lens?

• AAt point
• BAt point
• CAt point
• DAt point
• EAt point

Q14:

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

• A
• BNone
• C
• D