Q.

When an object is placed at infinity in a concave lens, the image is formed at the principal ____. If the object is placed between infinity and the optical centre of the lens, then the image is formed between the principal focus and the ____ centre.


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Detailed Solution

When an object is placed at infinity in a concave lens, the image is formed at the principal focus, and if the object is placed between infinity and the optical centre of the lens, then the image is formed between the principal focus and the optical centre.
The image is formed at the focus when an object is placed at infinity in a concave lens. The relative size of the image is highly diminished and point-sized. The nature of the image is virtual and erect.
Question ImageWhen the object is placed between infinity and the optical centre of the lens, then the image is formed between the focus and the optical centre. As a result, the relative size of the image is diminished, and the nature of the image is virtual and erect.
Question Image 
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