Determine the focal length of a thin converging lens if the power is 5.0 dioptres
- 0.1 m
-
0.2 m
- 2.0 m
- 2.5 m
The correct answer is: 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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