Question

A CONVEX LENS OF FOCAL LENGTH 25cm. THE NATURE , SIZE AND THE POSITION OF THE IMAGE FORMED WHEN THE OBJECT IS KEPT AT A DISTANCE OF 40 cm IS 
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Answer 1

Explanation:

As focal length is 25 cm

So ,centre of curavature will be 50 cm

Given,object distance is 40 cm .

As,object distance is less than centre of curvature but greater than focal length.

Therefore ,the object lies between Focus and center of curvature.

Hence,the image will be formed beyond centre of curvature.

The image formed will be -

Real,inverted,enlarged.

Hope it will help you...