The difference between optical microscope and electron microscope

Optical microscope is an optical instrument that magnifies and images tiny objects that can't be distinguished by human eyes and enables people to extract tiny structural information.

Electron microscope (English: electron

Microscope (abbreviated as electron microscope) is an electronic optical device that uses the signals generated by the interaction between electrons and substances to identify the crystal structure, microstructure, chemical composition, chemical bonds and electron distribution in microscopic areas. Commonly used are transmission electron microscope and scanning electron microscope. Compared with optical microscope, electron microscope uses electron beam instead of visible light, electromagnetic lens instead of optical lens, and uses fluorescent screen to image the invisible electron beam.

Ordinary optical microscope has low resolution (0.2 micron) and low magnification (2000), so it is impossible to analyze chemical components. The resolution of electron microscope is 0. 1 ~ 0.2 nm, and the magnification is tens of thousands to millions, so it can analyze chemical components. At present, I haven't heard of the concept of "submicroscopy", which may be produced after someone compressed the sentence "electron microscope can observe submicroscopic structure"