Which of the following is the lens formula?

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Question

(B) The lens formula relates the focal length $(f)$,the object distance $(u)$,and the image distance $(v)$ for a spherical lens.It is given by the exp

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$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$

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(B) The lens formula relates the focal length $(f)$,the object distance $(u)$,and the image distance $(v)$ for a spherical lens.It is given by the expression: $\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$.Here,$v$ is the distance of the image from the optical center,$u$ is the distance of the object from the optical center,and $f$ is the focal length of the lens.

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