Question

An object is placed at a distance of 30cm from a concabe lens of focal length 15 cm list four characters of the image formed by lens

Answer 1

Since the object is placed at a distance which is twice the focal length i.e. on centre of curvature, therefore the nature of image will be as follows-
1. it is formed at the centre of curvature
2. it is real
3. inverted
4. it is of the same size as that of object.

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