The diagrams show rays of light passing through two lenses labelled M and N. (i) Complete the sentence by putting a cross (✗) in the box next to your answer. The light changes direction as it leaves the lenses. This is called A contraction B diffraction C reflection D refraction (ii) The focal length of lens M is 2 m. Calculate the power of lens M.

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The diagrams show rays of light passing through two lenses labelled M and N - Edexcel - GCSE Physics - Question 2 - 2013 - Paper 1

Question 2

The diagrams show rays of light passing through two lenses labelled M and N. (i) Complete the sentence by putting a cross (✗) in the box next to your answer. The li... show full transcript

Worked Solution & Example Answer:The diagrams show rays of light passing through two lenses labelled M and N - Edexcel - GCSE Physics - Question 2 - 2013 - Paper 1

Step 1

Complete the sentence by putting a cross (✗) in the box next to your answer.

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Answer

The correct answer is D: refraction. Refraction is the bending of light as it passes from one medium to another, changing direction.

Step 2

Calculate the power of lens M.

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Answer

The power of a lens (P) is calculated using the formula:

$P = \frac{1}{f}$

where $f$ is the focal length in meters. Given that the focal length of lens M is 2 m:

$P = \frac{1}{2} = 0.5 \text{ D}$

Thus, the power of lens M is 0.5 D.

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