Question

4.4 How can an erect and magnified image be formed with the help of a convex lens?
With the help of which type of lens long-sightedness can be rectified?​

Answer 1

Ques) How can an erect and magnified image be formed with the help of a convex lens?

→ Positioning object between Origin and Focus gives erect and magnified image. (the ray diagram for this answer is in attachment)

Ques) With the help of which type of lens long-sightedness can be rectified?

→ Long sightedness (also called Hypermetropia) can be cured by using Convex Lens.

The convex lens used is of such power that it forms the image at the near point of hypermetropic eye.

[NOTE: Near point of hypermetropic eye > 25 cm]