Thus it is important to gain a preliminary knowledge about the principles of microscope and its types. A microscope is an optical instrument consisting of one or more lenses in order to magnify images of minute objects. An annulus aperture is placed in the front focal plane of the condenser and limits the angle of the penetrating light waves. Contrast is generated by absorption, scattering, etc. This exercise will Microscopes can be crucial importance as they help to view the microbes. Thus it i