Ray Optics - Optical Instrument - What is Simple Microscope Magnifier?

Simple Microscope(Magnifier)

A convex lens of large aperture and short focal length behaves as a simple microscope.

Principle :

When an object is placed between the pole and the focus of a convex lens, it forms a virtual magnified and erect image at the least distance of distinct vision (Normal eye = 25 cm).