question_answer

The linear magnification for a mirror is the ratio of the size of the image to the size of the object, and is denoted by m. Then m is equal to (symbols have their usual meanings)

A)  \[\frac{uf}{u-f}\]            

B)         \[\frac{u\,f}{u-f}\]

C)  \[\frac{\,f}{u+f}\]          

D)         none of these