A convex lens produces an image of height 6 cm from an object of height 2 cm. What is the magnification produced?

1. Magnification is $m = \dfrac{h'}{h}$, the ratio of image height to object height. 2. Substitute: $m = \dfrac{6}{2} = 3$. 3. Since $m > 1$, the image is enlarged, consistent with a magnified image. 4. The value $\tfrac{1}{3}$ inverts the ratio, a common slip, so it is wrong. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 2 Optics "Magnification of a Lens", p.30_