# 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:

An object is placed to the left of a convex lens. A screen is held at four positions to the right of the lens, as shown in the diagram. At which position of the screen is a sharp image of the top of the object seen?

• AIV
• BI
• CII
• DIII
• ENone of the positions

At which position of the screen is a sharp image of the base of the object seen?

• AIV
• BI
• CII
• DIII
• ENone of the positions

At which position of the screen is a sharp image of the entire object seen?

• AIV
• BI
• CII
• DIII
• ENone of the positions

Q9:

A convex lens produces a real image of an object, as shown in the diagram. What is the magnification produced by the lens?

Which of the following statements about the sizes of and distances from the lens of the image and object is correct?

• AThe difference between the distance from the object to the lens and the distance from the image to the lens is equal to the size of the object.
• BThe ratio of the size of the image to the size of the object is equal to the ratio of the distance from the image to the lens to the distance from the object to the lens.
• CThe difference between the distance from the object to the lens and the distance from the image to the lens is equal to the size of the image.
• DThe difference between the distance from the object to the lens and the distance from the image to the lens is equal to the difference between the size of the object and the size of the image.
• EThe ratio of the size of the image to the size of the object is equal to the ratio of the distance from the object to the lens to the distance from the image to the lens.

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? • APoint
• BPoint
• CPoint
• DPoint
• EPoint

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 five diagrams most correctly shows how a real image of the object is formed by the lens? • A • B • C • D • E Q13:

An object is placed to the left of a convex lens, as shown in the diagram. Three points in the diagram show possible positions of the focal point of the lens. The lens could produce the real image shown, or the virtual image of the shown, or neither of the images shown, depending on the position of its focal point. Which point would have to be the focal point of the lens for the real image shown to be formed?

• APoint III
• BPoint II
• CPoint I

Which point would have to be the focal point of the lens for the virtual shown image to be formed?

• APoint III
• BPoint II
• CPoint I

Which point would have to be the focal point of the lens for neither of the images shown to be formed?

• APoint III
• BPoint I
• CPoint II

Q14:

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