Define power of a lens and write its units.

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Solution

Power:-
The Power of the lens is the ability of the lens to converge or diverge the rays of light falling on it.
The power of a lens is the reciprocal of its focal length in meters, i.e.; $P = \frac{1}{f}$ .
The S.I unit of power is Dioptre (D).

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Define power of a lens and write its units.

Power:-The Power of the lens is the ability of the lens to converge or diverge the rays of light falling on it.The power of a lens is the reciprocal of its focal length in meters, i.e.; P=1f.The S.I unit of power is Dioptre (D).

Power:-
The Power of the lens is the ability of the lens to converge or diverge the rays of light falling on it.
The power of a lens is the reciprocal of its focal length in meters, i.e.; $P = \frac{1}{f}$ .
The S.I unit of power is Dioptre (D).