To solve the problem, we need to understand the reason why a convex lens is used in a microscope.
1. Basic Properties of a Convex Lens:
A convex lens, also known as a converging lens, can produce both real and virtual images depending on the position of the object. When used properly, it can magnify small objects.
2. Working of a Simple Microscope:
In a simple microscope (which uses a single convex lens), the object is placed between the optical center and the principal focus of the lens.
In this configuration, the lens forms a magnified, virtual, and erect image on the same side of the lens as the object.
3. Application in Microscopes:
This magnified virtual image helps in observing small details of objects that cannot be seen with the naked eye, which is why convex lenses are preferred in microscopes.
Final Answer:
The convex lens is used in the microscope because \({\text{it gives magnified virtual image on same side of the object}} \).