Physics - Geometrical Optics Question with Solution | TestHub

(A) Converging lens: a real object gives a real image (u > f) or a virtual image (u < f); a virtual object always gives a real image, so virtual object virtual image is not possible: A-Q, R, S. (B) Diverging lens: a real object always gives a virtual image; a virtual object gives a real image within the focal length and a virtual image beyond it: B-P, Q, S. (C) Light goes from $\mu =1.5$ into air: $\frac{1}{v}-\frac{1.5}{u}=\frac{1-1.5}{R}\Rightarrow \frac{1}{v}=-\frac{1}{2R}+\frac{3}{2u}$. A real object (u -ve) gives v -ve, virtual image only; a virtual object (u +ve) can give v +ve or -ve: C-P, Q, S. (D) Light goes from air into $\mu =1.5$: a real object can give a real or a virtual image; a virtual object always gives a real image: D-Q, R, S. Hence option (A).