Science, asked by van007, 11 months ago

Q1. The power of a lens is - 40 D, what is its focal length?

Answers

Answered by acmotoe

1

Answer:

1/focal length(in m)=-40

focal length=-0.025m

Answered by Pp147

1

P=1/f so => -40=1/f converting D to cm 100/-40=f => f =2.5

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