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电子显微镜是利用高速飞行的电子来代替可见光作为显微镜的光源的。光学理论和实验证明,被观察物体小于照明光线波长的一半,光线就将绕过该物体,而使显微镜无法看到。电子在很强的电塌内被加速后,也具有波动性质,它的波长约0.05埃(1埃等于千万分之一毫米),约为可见光波长的十万分之一,因此,电子显微镜的分辨本领和显微放大能力,要比光学显微镜高得多,可以用来观察到光学显微镜无法看到的物质微观组织。 (1)小儿麻痹症病毒。病毒是比细菌还要小的微生物,小儿麻痹症病毒是许多病毒中较小的一种。 (2)这是一种腺病毒。上图是它在细胞核内的晶体排列
Electron microscopy uses high-speed flying electrons instead of visible light as the light source of the microscope. Optical theory and experiments have shown that the observed object is less than half the wavelength of the illuminating light, and the light will bypass the object and the microscope cannot see it. After the electrons are accelerated in a strong electric collapse, they are also fluctuating. Its wavelength is about 0.05 angstroms (1 angstrom equals one millionth of a millimeter) and is about one hundred thousandth of the wavelength of visible light. Therefore, the electron microscope The resolution and micro-magnification capabilities are much higher than those of optical microscopes and can be used to observe the microstructure of the material that cannot be seen with light microscopy. (1) Polio virus. Viruses are smaller than bacteria, and polio is the smaller of many viruses. (2) This is an adenovirus. Above is its crystal arrangement in the nucleus