Which do you prefer, an optical microscope or an electron microscope?
With the rapid development of science and technology, the application of electron microscope in the field of microscopy is very broad prospects, more than the optical microscope has shown its unique superiority. However, because of the application of optical microscope and electron microscope technology and field are different, electron microscope and can not completely replace the optical microscope.
Application in biology, optical microscope resolution is far less than the electronic microscope, because the resolution of the optical microscope by the diffraction limit, so its resolution can not be less than half of the wavelength of the incident light. That is to say, if the incident light of 400nm, then the observation object can not be less than 200nm, but because it can be real-time, dynamic observation, the status in biology is unparalleled, just like in the field of biology is impossible to leave the fluorescence microscope and confocal and other optical microscopes. And electron microscope because of the use of electron beam to scanning imaging, its resolution can easily reach the nanometer level, which is irreplaceable for the application of high-resolution imaging.
In metallographic applications, the magnification of the electron microscope is also far more than the optical microscope, the maximum magnification of the modern electron microscope has been more than 3 million times, while the maximum magnification of the optical microscope is about 2,000 times, so the electron microscope is able to directly observe the atoms of certain heavy metals and crystals in the atom of the neatly arranged array of dots.
