GCSE level optics questions
Q17. (a) Ozzy investigates how a lens forms an image of a light bulb.
The image is formed on a screen. Here is the apparatus he used.
![](17diagram.png)
(i) Name the process that occurs at the lens to make an image form on the screen.
[1 mark]
(ii) Delete the incorrect image properties from the following sentence:
Light arriving on the screen forms an image which is real/virtual and upright/inverted. |
[2 marks]
(iii) The student places an object 2.0 cm tall near to the lens. The image formed on the screen is 3.0 cm tall. Calculate the magnification of the image.
[3 marks]
(b) The diagram on the graph paper shows a ray diagram of a converging (convex) lens with an object. The diagram shows two rays of light leaving the object and reaching the lens.
![](17.png)
(i) Complete the diagram to show how these two rays form an image.
[2 marks]
(ii) Mark the position of the image with an arrow.
[1 mark]
(iii) State the name of the two points labelled F on the diagram.
[1 mark]
(Total 10 marks)
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