5 (a) Human eyes and digital cameras both have parts with the same function.

Complete the missing parts in Table 2.

(2 marks)

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5 (b) Long sight is a defect of the human eye.

State two causes of long sight.

(2 marks)

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5 (c) Long sight can be corrected by wearing spectacles with converging (convex) lenses.

A lens in these spectacles has a power of +3.2 dioptres.

Calculate the focal length of this lens.

Use the correct equation from the Physics Equations Sheet.

Focal length = …………………………………………. metres

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5 (d) Figure 8 shows a ray of light passing through a converging (convex) lens.

5 (d) (i) Use the information in Figure 8 to calculate the refractive index of the glass used to make the lens.

Use the correct equation from the Physics Equations Sheet.

Refractive index = …………………………….
(3 marks)

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5 (d) (ii) Different lenses of the same power can be made using glass of a different refractive index.

State one advantage of making spectacles using lenses made from glass of a higher refractive index.

(1 mark)

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From Q5 P3 AQA June 2014 (Higher)