What type of lens does a monocular microscope primarily utilize?

A monocular microscope primarily utilizes a single ocular lens, which is commonly a convex lens that allows for the magnification of specimens. This type of lens works by bending light rays to converge and create a magnified image of the object being observed. Monocular microscopes are characterized by having only one eyepiece, hence the term "monocular," which means one eye.

The use of only one ocular lens simplifies the design of the microscope and makes it easier for users to focus on an individual specimen. This design is functional and effective for observing a wide variety of samples in biological and physical sciences.

In contrast, a concave lens diverges light rays, which is not suitable for magnification in the context of a microscope. Additionally, while multiple ocular lenses can be found in binocular microscopes (which allow for a three-dimensional view), a monocular microscope specifically operates with a single lens, catering to users who may prefer a simpler setup or need to use the microscope in environments where space or budget constraints exist.