MAHARASHTRA Class 10: Uses of lenses Videos | Refraction of Light

Image distance (v) =+15 cm…(real image)

Focal length(f) =+10 cm …(for convex lens f is positive)

Object distance(u) can be determined using lens formula,

The object distance is -30 cm.

The magnification is positive. Thus, the nature of the image is virtual and erect.

The value of magnification is 0.5 which is less than 1. Thus, the image formed is diminished.

The image of such nature is formed by a concave lens.

If the magnification produced is +0.5, then the nature of the image is virtual and erect, and the nature of the lens is a concave lens.