The power of a convex lens of focal length 20cm is
- 0.05D
- 0.50D
-
5.00D
- 50.00D
The correct answer is: C
Explanation
The Power is given by: P = \(\frac{1}{f}\)
f = 20cm ā 0.2m
P = \(\frac{1}{0.2}\) = 5 dioptres
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