The lens shown in the diagram has a focal length of 12.0 cm - Edexcel - GCSE Physics - Question 1 - 2014 - Paper 1
Question 1
The lens shown in the diagram has a focal length of 12.0 cm.
(a) Complete the sentences by putting a cross (X) in the box next to your answer.
(i) This lens can pr... show full transcript
Worked Solution & Example Answer:The lens shown in the diagram has a focal length of 12.0 cm - Edexcel - GCSE Physics - Question 1 - 2014 - Paper 1
Step 1
This lens can produce
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Answer
The lens can produce both real and virtual images. Thus, the correct answer is D: both real and virtual images. A convex lens can create both types depending on the position of the object relative to the focal point.
Step 2
The power of the lens is
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Answer
The power (P) of a lens is calculated using the formula:
P = rac{1}{f}
where f is the focal length in meters. Given that the focal length f=12.0 cm, we first convert this to meters:
f=0.12extm
Substituting into the formula gives:
P = rac{1}{0.12} = 8.33 ext{ dioptres}
Thus, rounding to one decimal place, the correct answer is B: approximately 8.3 dioptres.
