State the characteristics of an image and draw a neat diagram when an object is between optical centre and principle focus of a convex lens.

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Solution

When the object is placed between the principal focus and optical centre of a convex lens, it forms a virtual, erect and magnified image.

The ray parallel to the principal axis passes through the focus after refraction from the lens.
The ray passing through the optical centre emerges undeviated.
On extending these 2 rays, they appear to diverge such that a virtual, erect and magnified image $A^{'} B^{'}$ is formed on the same side of the lens.

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