Question

At what position of the object does a convex lens act as a magnifying glass?
(a) between F and 2F
(b) between F and O
(c) Beyond F
(d) Beyond 2F

Answer 1

A convex lens act as a magnifying lens when the object is positioned between F and O.

Explanation:

A convex lens or converging lens in one in which parallel rays of light pass through to get refracted and converge at the principal focus. The distance between the principal focus and the centre of the lens is called the focal length.

The image formed by the convex lens needs to be erect and larger than the object in order to serve as the magnifying lens.

When the object is placed between F and 2F, the image will be inverted and same size. So it can't be used.

When the object is placed between F and O, the image will be erect and magnified. Hence this is the optimum position.

Answer 2

Answer:

between f and o about the rules