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