When an object is placed at infinity in a concave lens, the image is formed at [[1]]. If the object is placed between the infinity and optical centre of the lens, then the image is formed between Focus and the [[2]].

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Detailed Solution

When an object is placed at infinity in a concave lens, the image is formed at Focus. If the object is placed between the infinity and optical centre of the lens, then the image is formed between Focus and the optical centre.
When an object is placed at infinity in a concave lens, the image is formed at Focus. As a result, the relative size of the image is highly diminished and point-sized. As a result, the image is virtual and erect.

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When the object is placed between the optical centre of the lens and infinity, then the image is formed between Focus and the optical centre. The absolute size of the image is diminished. The image is virtual and erect.