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...Microscopy the technology of making very small things visible to naked eye units measurement metric system is used measure microorganisms basic unit length meter all are related each other by factors prefixes indicate relationship a e g and u s equivalents equivalent kilometer km m mile in decimeter dm centimeter cm millimeter mm micrometer um nanometer nm picometer pm instruments simple microscopes only have one lens similar magnifying glass leeuwenhoeck allowed him magnify images from x they were so difficult focus he built new for specimen total did not share his techniques with scientists even today source lighting unknown daughter donated royal society shortly before death compound light cl history first developed zaccharias janssen dutch spectacle maker poor quality could see bacteria joseph jackson lister father improved microscope basis modern use as illumination several lenses originates an illuminator passes through condenser which direct onto then enters objective image thes...