Physics
JAMB 2017
Determine the focal length of a thin converging lens if the power is 5.0 dioptres
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A.
0.1 m
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B.
0.2 m
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C.
2.0 m
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D.
2.5 m
Correct Answer: Option B
Explanation
Power of a lens = \(\frac{1}{f}\)
f = focal length
f = \(\frac{1}{p}\)
= \(\frac{1}{5}\)
= 0.2m
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