'आवर्धन क्षमता' का सूत्र क्या है?

उत्तर: (D) m = -v/u — Magnification m = -v/u = height of image/height of object. Negative sign follows sign convention. For mirrors: m positive = erect image, m negative = inverted. |m| > 1 = magnified, |m| < 1 = diminishe...