- #1
Ashu2912
- 107
- 1
In the derivation of the mirror and magnification formula, v, u and f represent image distance, object distance and focal length resp. While deriving, we take v,u and f as the actual measurements of distances, apply sign convention to these, and come to the mirror formula. Thus, in the mirror formula, v,u and f must represent the actual measurements. Then, in numericals, why do we replace v,u and f with the signs and why not consider them as the magnitudes of distances only?