Question

Define linear magnification produced by a mirror

Answer 1

1. Linear magnification produced by a spherical mirror is defined as the ratio of the size of the image formed by the mirror to the size of the object.
2. It is denoted by m.
3. Therefore, $m=I/O$ where,I is the size of image
   And, O is the Object size
4. In terms of object distance and image distance, m is given as $m=-\frac{v}{u}$ where v and u have to be kept with the sign.
5. If $\left|m\right|<1$, the image size is less than that of object.
6. If $\left|m\right|>1,$, the image size is greater than that of the object size.
7. If $m$ is negative, the image formed is inverted.
8. If $m$ is positive, the image formed is erect.