Define power. – InterviewSolution

InterviewSolution

1.	Define power.
Answer» <P> SOLUTION :(i) Ability of a LENS to converge (convex lens) or diverge (concave lens) is called as its power. (ii) The power of a lens can be defined as the degree of convergence or divergence of light rays. (iii) Power of a lens is numerically defined as the reciprocal of its focal length . `P=(1)/(f)` The SI unit of power of a lens is dioptre.

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