MERRYLAND INTERNATIONAL SCHOOL
DEPARTMENT OF PHYSICS - GRADE 8
LIGHT – LENSES – MULTIPLE CHOICE
1. The ray diagram shows the image of an object formed by a converging lens.
What is the focal length of the lens?
A. 40 cm
B. 50 cm
C. 72 cm
D. 90 cm
2. In the diagram, the distance OP is the focal length of the converging lens. One ray of light from
O is shown. Through which point will this ray pass, after refraction by the lens?
3. A parallel beam of light falls on a converging lens. Which diagram shows what happens to
the beam of light?
4. Which statement about a converging lens is not correct?
A. A ray parallel to the principal axis of the lens is refracted through the principal focus.
B. All rays of light refracted by the lens pass through the principal focus.
C. The distance between the centre of the lens and the principal focus is the focal length.
D. The principal focus of the lens is a point on the principal axis.
5. An object O is placed close to a thin converging lens. The diagram represents three rays from
the top of O passing through the lens. Which type of image is produced by the lens when the
object O is in this position?
A. real and diminished
B. real and enlarged
C. virtual and diminished
D. virtual and enlarged
6. A student draws a diagram representing three rays of light from point P passing through a
converging lens. Each point labelled F is a principal focus of the lens.Which of the rays has
the student drawn correctly?
A. ray X and ray Y
B. ray X and ray Z
C. ray Y only
D. ray Z only
7. Which labelled distance is the focal length of the lens?
8. The diagram represents a converging lens forming an image of an object. Which distance is the
focal length of the lens?
A. PQ
B. PR
C. QR
D. QS
9. The diagram shows a converging lens forming an image of an object. Which statement about
the image is correct?
A. It is real and can be seen by an eye at X.
B. It is real and can be seen by an eye at Y.
C. It is virtual and can be seen by an eye at X.
D. It is virtual and can be seen by an eye at Y.
10. Which diagram correctly represents rays of light passing through a converging lens in a camera?
11. Which diagram shows how an image of an object is formed on a screen by a converging lens?
12. A converging lens in a projector is used to make an enlarged image of a small piece of film on a
screen. At which labelled point could the piece of film be placed so that the lens produces this I
image?
13. A thin converging lens is used to produce, on a screen, a focused image of a candle. Various
focused images are produced on the screen by moving the lens and the screen backwards
and forwards. Which statement is always correct?
A. The image is at the principal focus (focal point) of the lens.
B. The image is bigger than the object.
C. The image is closer to the lens than the object is.
D. The image is inverted.
14. An object O is placed in front of a converging lens of focal length ‘f’. At which point will the top of
the image be seen?
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