Which of the lenses with focal lengths 10 , c | vedclass

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(D) The power $(P)$ of a lens is defined as the reciprocal of its focal length $(f)$ in meters,given by the formula $P = \frac{1}{f(m)}$.Since $P \pro

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$10$

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(D) The power $(P)$ of a lens is defined as the reciprocal of its focal length $(f)$ in meters,given by the formula $P = \frac{1}{f(m)}$.Since $P \propto \frac{1}{f}$,a lens with a smaller focal length will have a higher power.Comparing the given focal lengths: $10 \, cm Therefore,the lens with the focal length of $10 \, cm$ will have the maximum power $(P = \frac{1}{0.1} = 10 \, D)$.

Which of the lenses with focal lengths $10 \, cm$,$20 \, cm$,$25 \, cm$,and $50 \, cm$ has the maximum power (in $, cm$)?

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