Physics - Geometrical Optics Question with Solution | TestHub
In column I certain combinations of small object and image are marked. Match them with possible refracting/reflecting body in column II. In all cases, object is perpendicular to x-axis. Object can't be at zero distance from the interface.
Column I
(A) Virtual image of virtual object
(B) Real image of real object
(C) Erect real image of same size as object
(D) Erect and virtual image of larger size than the object
Column II
(P) Converging lens
(Q) Light is incident from air on the spherical surface
(R) Convex mirror
(S) Light is incident from right to left
(T) Diverging lens
Options:
Answer:
Solution:
(A) With a virtual object, a convex mirror and a diverging lens each give a virtual image when the virtual object lies beyond the focal point, so A matches R, T. (B) A real object forms a real image with a converging lens (u > f) and also on refraction from air into water at a convex spherical surface, so B matches P, Q. (C) A plane refracting surface forms an erect, same-size, real image of a virtual object, so C matches S. (D) An erect, virtual, magnified image is produced by a converging lens with u < f and by the spherical refracting surface when the object is close to it, so D matches P, Q. Hence option (A).
