The basic principle of bright field microscopy relies on the contrast created by light passing through the specimen. The microscope typically consists of a light source, condenser lens, objective lens, and ocular lens. The light source illuminates the specimen, and the condenser lens focuses the light onto it. As light passes through the specimen, it interacts with the cellular components, creating varying degrees of contrast. The objective lens magnifies the image, which is further enlarged by the ocular lens for the observer.
