GCSE level optics questions
Q2.
(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 marks)
(ii) Name the point where the rays come together.
(1 mark)
(iii) What word can be used to describe this type of lens?
(1 mark)
(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?
(1 mark)
(ii) Explain your answer to part (b)(i).
(1 mark)
(iii) What word can be used to describe this type of lens?
(1 mark)
(c) Complete the following three sentences by choosing the correct words from each bracketed section.
In a camera a converging lens is used to produce an image on a (film/lens/screen)
The image is (larger than/smaller than/the same size as) the object.
Compared to the distance of the image from the lens, the object is (further away from/nearer to/the same distance from) the lens.
(3 marks)
(d) Explain the difference between a real image and a virtual image.
(3 marks)
(Total 13 marks)
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