A virtual, erect and magnified image of an object is to be obtained with a convex lens. For this purpose, the object should be placed : (a) between 2F and infinity (b) between F and optical centre (c) between F and 2F (d) at F

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Solution

(b) between F and optical centre
this is because the image formed at this point is virtual erect and magnified and that is how we use a magnifying glass.

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A virtual, erect and magnified image of an object is to be obtained with a convex lens. For this purpose, the object should be placed : (a) between 2F and infinity (b) between F and optical centre (c) between F and 2F (d) at F

(b) between F and optical centre this is because the image formed at this point is virtual erect and magnified and that is how we use a magnifying glass.

(b) between F and optical centre
this is because the image formed at this point is virtual erect and magnified and that is how we use a magnifying glass.