Question

What is the focal length of a lens power 2.0D.what type of lens is it

Answer 1

Answer:

It is convex lens because it focal length is positive.

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Answer 2

Answer:

Explanation:

✴ Power of a given lens = 2.0 Dioptre.

✴ AS PER THE FORMULA ,

Power = 1/Focal Length.

✳ P = 1/f.

✳ 2.0 = 1/f.

✳ f = 1/2 = 0.5m.

✴ IT IS A CONVESING LENS OR CONVEX LENS.