Question

what is power of convex lens having local length 1 cm​

Answer 1

Answer:

1 dioptre is SI unit of the power of a lens whose focal length is 1 metre. It is denoted by the letter D. Thus 1D = 1 m-1. Simply, when focal length ' f ' is expressed in metres, then, power is expressed in dioptres. The power of a convex lens is positive and that of a concave lens is negative.

Answer 2

Answer:

100 D

Explanation:

Power = Reciprocal of focal length.

Given focal length = 1 cm = 0.01 m

So, Power =  1/0.01

                 =100 m⁻¹

                 = 100 D

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