Physics at Singapore School with Mr.
Peter
SIS@VT IGCSE Physics
Lenses
Past Paper Exam questions: Assignment Due 22/10/2021 (Start now)
Name: ____________________________
Q1.
(a) The diagram shows two parallel rays of light, a lens and its axis.
(i) Complete the diagram to show what happens to the rays.
(2)
(ii) Name the point where the rays come together.
______________________________________________________________
(1)
(iii) What word can be used to describe this type of lens?
______________________________________________________________
(1)
(b) The diagram shows two parallel rays of light, a lens and its axis.
(i) Which point A, B, C, D or E shows the focal point for this diagram?
Point _________
(1)
(ii) Explain your answer to part (b)(i).
______________________________________________________________
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Physics at Singapore School with Mr. Peter
______________________________________________________________
(1)
(iii) What word can be used to describe this type of lens?
______________________________________________________________
(1)
(c) Complete the following three sentences by crossing out the two lines in each box
which are wrong
film
In a camera a converging lens is used to produce an image on a lens
screen
larger than
The image is smaller than the object.
the same size as
Compared to the distance of the image from the lens, the object is
further away from
nearer to the lens.
the same distance from
(3)
(d) Explain the difference between a real image and a virtual image.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
(3)
(Total 13 marks)
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Physics at Singapore School with Mr. Peter
Q2.
(a) The diagram shows how parallel rays of light pass through a convex lens.
(i) Mark the position of the focus.
(1)
(ii) Is this a converging lens, a diverging lens, both or neither?
______________________________________________________________
(1)
(b) The diagram shows how parallel rays of light pass through a concave lens.
(i) Mark the position of the focus.
(1)
(ii) Is this a converging lens, a diverging lens, both or neither?
______________________________________________________________
(1)
(c) Complete these sentences by crossing out the two lines in each box that are wrong.
In a camera, a lens is used to produce an image of an
object on a .
The image is the object.
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The image is the lens, compared to the distance of the
object from the lens.
(4)
(d) In a cinema projector, a convex lens is used to produce a magnified, real image.
(i) What does magnified mean?
______________________________________________________________
______________________________________________________________
(1)
(ii) What is a real image?
______________________________________________________________
______________________________________________________________
(1)
(e) You are in a dark room. You have a box containing some lenses. Only one of them
is a converging lens.
Describe how, by just feeling the lenses, you can pick out the converging lens.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
(2)
(Total 12 marks)
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Physics at Singapore School with Mr. Peter
Q3.
(a) A camera was used to take a photograph. The camera contains a convex
(converging) lens.
Complete the ray diagram to show how the lens produces an image of the object.
F = Principal focus
(4)
(b) State two words to describe the nature of the image produced by the lens in the
camera.
1. _smaller_________________________________________________________
2. _inverted_________________________________________________________
(2)
(Total 6 marks)
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