Can an optical microscope see molecular structures?
Can molecules be seen under a light microscope?
Can water molecules be seen with a light microscope?
Can a 현미경 see protein molecules?
It is the electron microscope that can observe the molecular structure, and the magnification of the electron microscope can reach 15 million times.
In the 1970s, the transmission electron microscope was a more popular type of microscope. Its resolution was about 0.3 nanometers, while the human resolution was about 0.1 millimeters. that was the initial state of the development of the electron microscope.
In 1931, a German scientist modified a high-voltage oscilloscope with a cold cathode discharge electron source and three electron lenses. After modification, he found that the oscilloscope could magnify the object several times. In this way, he invented the transmission electron microscope, and the invention of the high-voltage oscilloscope also proved the magnification function of the electron microscope to the world.
At the beginning of the 20th century, scientists in the United States made new breakthroughs in the research on the resolution of the electron microscope, and soon reached the modern level. At this time, in China, the electron microscope also developed by leaps and bounds.
지금 그 배율 의 전자 현미경 할 수 있는 도달 범위 15 백만 횟수, while the 배율 의 광학 현미경 is only 2000 times. This is also the difference between the electron microscope and the optical microscope, so we can directly observe the atoms in the metal through the electron microscope conditions and the orderly arrangement of atoms in semiconductors.
그는 분해 파워 의 전자 현미경 is still far superior to that of the light microscope. The 최대 배율 의 the 광학 현미경 is 약 2000 times, while the 최대 배율 의 현대 전자 현미경 is more than 3 million times, so the atoms of some heavy metals and the neatly arranged atomic lattices in the crystal can be directly observed through the electron microscope (note that only You can't see the atomic structure when you see the arrangement, and you can't see it with 전자 현미경 at the 분자 수준. What you can see under the microscope is the crystal shape of molecules with different configurations)
Current microscopes can hardly see molecules clearly, not because the magnification is not enough, but because the resolution of optical microscopes cannot reach it. The current high-resolution STORM is about 20nm, which means that two points separated by more than 20nm can be seen clearly, and those below 20nm can be seen as a mass.
Molecules are basically at least at the nanometer level. If you use an electron microscope, it's hard to say. The magnification of the electron microscope can reach 10,000 times, and the resolution of the electron microscope is at the nanometer level. At the same time, I want to tell you that the resolution is very important. , if the resolution is not up to, the magnification is useless at high.
