Diagram 1 shows an eye. (a) (i) Use words from the labels on diagram 1 to complete the sentence. The parts of the eye which focus light are the cornea and the lens. (ii) Lenses of different powers are shown in diagram 2. Diagram 2 A B Explain which lens has the greater power.

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Diagram 1 shows an eye - Edexcel - GCSE Physics - Question 3 - 2014 - Paper 1

Question 3

Diagram 1 shows an eye. (a) (i) Use words from the labels on diagram 1 to complete the sentence. The parts of the eye which focus light are the cornea and the ... show full transcript

Worked Solution & Example Answer:Diagram 1 shows an eye - Edexcel - GCSE Physics - Question 3 - 2014 - Paper 1

Step 1

Use words from the labels on diagram 1 to complete the sentence.

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Answer

The parts of the eye which focus light are the cornea and the lens.

Step 2

Explain which lens has the greater power.

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Answer

Lens B has the greater power because it is:

more curved,
has a smaller radius of curvature,
is thicker, and
it bends or refracts light more effectively.

As a result, it has a shorter focal length.

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