The differences between light and electron microscopes are noted. Compare the different spellings of related terms.
The difference between an optical microscope and an electron microscope is that an optical microscope can only see certain cell structures, such as cell walls, chloroplasts, stained chromosomes, mitochondria, nuclei, etc. small organelles. In short, the light microscope can see the microscopic structure of cells, and the electron microscope can see the submicroscopic structure.
The main difference is the magnification. Optical microscopes have a magnification limit, and no matter how large the zoom is, the human eye cannot distinguish it. y(min)=0.61*wavelength)/(n*sinu) —— Even if n*sinu is immersed in oil, the maximum is about 1.5, and the rest depends on the size of the wavelength. Therefore, the maximum optical microscope is about 1000 times, and it is useless to zoom in. Electron microscopes use electron beams for imaging, and the wavelength is much smaller than that of visible light, so the minimum resolution distance y(min) is much smaller, and smaller details can be resolved, and the magnification can reach several million.
Introduction to Solid Microscope Features of Solid Microscope
Introduction
Solid microscopes are also called "dissecting microscopes", "stereo microscopes", "stereo microscopes" and "operating microscopes". The solid microscope has two sets of eyepieces and a large objective lens. There is a set of triangular prisms between the eyepieces and the objective lens, which can turn the inverted image formed by the optical path into a positive image, which is consistent with the real thing. In addition, both eyes can observe at the same time. It shoots light, so it has a strong sense of reality. It can also be dissected and observed at the same time, which is very convenient. Generally, it can be enlarged by 10-150 times.
features
Solid microscopes have the following characteristics:
1. The left and right light beams in the binocular tube are not parallel, but have a certain angle - stereoscopic angle (generally 12 degrees - 15 degrees), so the imaging has a three-dimensional sense;
2. The image is upright, which is convenient for operation and dissection, because the prism under the eyepiece inverts the image;
3. Although the magnification is not as good as that of conventional microscopes, its working distance is very long
4. The depth of focus is large, which is convenient for observing the whole layer of the object under inspection.
5. Large diameter of field of view.
