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GCSE level optics questions

Q24. The diagram below shows how a lens forms an image of an object.

(a) What type of lens is represented in the diagram?

A convex lens (or a converging lens)

[1 mark]

(b) Calculate the magnification produced by the lens.

size of object = 2.0 cm

size of image = 0.8 cm

magnification = (size of image)/(size of object)

magnification = 0.8/2.0 = 0.4

[4 marks]

(c) Describe the image produced by the lens.

The image is diminished, real and inverted.

[3 marks]

(Total 8 marks)