Question

The power of a convex lens of focal length 25 cm is ___

(a) + 4.0 D (b) 0.25 D (c) - 4.0 D (d) - 0.4 D​

Answer 1

Answer:

the power of a convex lens of focal length 25cm is 4.0D

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Answer 2

Answer:

P = 1/f [f in metre ]

P = 100/25

P = +4.0 D

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