Question

What is the power of the lens with focal length -3 m. (find the answer in decimal)

Answer 1

Answer:

-0.33

Explanation:

Power of lens(p)=1÷f if focal length given in metre

So p=1÷(-3)

p= -0.33D

Answer 2

Answer:

Power of lens = 1 / ( focal length)

= 1/(-3) D

-1/3 D

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