magnification lens

Question

Linear magnification m for lens is:

RankGuru · Accepted Answer

**Linear Magnification ($m$)** is the ratio of image height ($h'$) to object height ($h$).
- For a lens: $m = \frac{h'}{h} = \frac{v}{u}$
- For a mirror: $m = -\frac{v}{u}$
- If $m$ is positive, the image is virtual and erect.
- If $m$ is negative, the image is real and inverted.

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Linear magnification m of lens equals?