Question

the power of a lens is 5D find its lenght

Answer 1

Explanation:

since

p = 1/ f

-5 = 1/ f

f = - 0.2 m

it is a concave lens

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Answer 2

since

p = 1/ f

-5 = 1/ f

f = - 0.2 m

it is a concave lens

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