Question

Which type of lens is used by the watch makers while repairing fine parts of a wrist watch ?

Answer 1

convex lens as the image is virtual,erect and magnifies when it is placed near an object.

Answer 2

Convex lens or magnifying lens

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

So, a watchmaker would use a convex lens in order to be able to magnify the tiny parts of a watch and view them effectively.