<prompt> The microscope used in microbiology -Light microscopePhase contrast microscopeFluorescent microscopeAll  <response>: Why is it necessary to use a microscope in microbiology?The diameter of the smallest object that can be seen by the naked unaided eye is about 200U.Most microorganisms are smaller than this and therefore, they should be sufficiently magnified before study.For this purpose various types of microscopes are available.Types of microscopes A Visible light as a source of illuminationBright-field microscope, commonly known as a light microscope or optical microscope.Darkfield microscopePhase contrast microscopeB UV rays as a source of illuminationFluorescence microscopeC Electron beam forms image of specimenElectron microscopeD Surface forces form image of specimenAtomic force microscope AFM 