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What is the change of image observed as the object is moved from infinity towards the concave lens?
A concave lens forms different types of images when the object is placed at
1. Infinity
2. Between infinity and optical centre, O
When the object is at infinity, an image is formed by a concave lens at principal focus F1.
Properties of Image: Image is point sized, highly diminished, virtual and erect.
Case 2. The object is between the optical centre, O and infinity:
When an object is placed between the optical centre and infinity of a concave lens, the image is formed between principal focus F1 and optical centre, O.
Properties of Image: Image is diminished, virtual and erect.
So, in the case of the concave lens, we always get erect images, diminished images and virtual images.
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