Definitions Microscope-a device with a lens or series of lenses that enlarge(magnify) the appearance of an object Does not apply to sem Image- Perception of an object using your eyes (vision). One can sense an object without vision (touch, etc . ). Requires visible light Lens -A lens is an optical component which is used to focus beams of radiation Lenses for light are usually made of a glassy material, whereas non-uniform electromagnetic fields are used as lens for electronsDefinitions Microscope - A device with a lens or series of lenses that enlarge (magnify) the appearance of an object. Does not apply to SEM. Lens - A lens is an optical component which is used to focus beams of radiation. Lenses for light are usually made of a glassy material, whereas non-uniform electromagnetic fields are used as lens for electrons. Image - Perception of an object using your eyes (vision). One can sense an object without vision (touch, etc..). Requires visible light