Question

what is mean by power of lens? define its SI unit​

Answer 1

The ability of a lens to converge/diverge a beam of light rays is expressed in terms of its Power(P). P=1/f The SI unit of power of lens is Dioptre . do you want more information

Answer 2

hey buddy,

here is your ans..

power of a lens is its ability to refract light rays. power is equal to the reciprocal of its power. its SI unit is dioptre (symbol D). 1D = 1/1m. 2) concave lens has a negative focal length while convex lens has a positive focal length

I hope it helps you

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