Question

What is meant by power of a lens?

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Answer 1

Question:

What is meant by power of lens ?

Explanation:

The power of a lens is defined as the reciprocal of its focal length. It is represented by the letter P. S.l. unit of power is dioptre (D). It can also be defined as P=1/f where f is the focal length.

Answer 2

Answer:

Explanation:

Power of lens is defined as ability of a lens to converge / diverge a beam of light rays falling on lens . Power of lens is reciprocal of focal length where p is power of lens and f is focal length. S.l. unit of power is dioptre (D).If a lens has a shorter focal length it is said to be more powerful.

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