Practice question

**Convex lens image formation**: object beyond 2F (u>2f) real inverted diminished between F and 2F, at 2F same size at 2F, between F and 2F magnified beyond 2F, at F image at infinity, within F virtual erect magnified same side. For f=15 cm, u=30 cm=2f, m = v/u =30/30=1? Actually v=30 cm, m=-1, same size inverted. For a convex lens, a virtual and magnified image is formed when the object is placed between the focal point (F) and the optical center (O). In this position, the rays diverge after refraction, and their backward extensions converge on the same side as the object, producing a virtual,