Question

The power of a convex lens of focal length 25 cm is______.
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Answer 1

4 diopters

as we know p=1/f(in cm)

so p = 100

--------

f(in cm)

hence 100/25 = 4D

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Answer 2

Answer:4D

Explanation:f=0.25m

P=1/f

P=1/0.25

P=100/25

Therefore, P=4D