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GCSE level optics questions

Q1.

The diagram shows a periscope being used to see over the heads of a crowd of people. The periscope has been made using two plane mirrors.

 

(a)     Using a ruler, complete the diagram to show how the second ray of light from a distant object reaches the person's eye.

reflection shown at both mirrors

ray parallel to the given ray (judged by the eye of the examiner)

The eye diagram is not really a drawing of 'the eye' it is representative of the eye - light only enters through the pupil of the eye - but that would be impossible to show on a diagram....

(2 marks)

(b)     How big is the image produced by the periscope compared to the size of the object?

The same size as the object.

(1 mark)

(Total 3 marks)