Question

A convex lens has a focal length of 10 cm. at which of the following position should an object be placed

so that this convex lens may act as a magnifying glass?​

Answer 1

Answer:

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When the image is magnifying for convex lens it's mean the object is placed between the pole and focal length. The object distance will be less than the focal length of the convex lens. So, the object is placed at 7 cm then the magnifying image will be form.

Answer 2

Answer:

7 cm,

since the image of an object placed between the focus and the optical centre of a convex lens is enlarged and virtual.