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真空技术是现代科学技术中不可缺少的一环,随着国防和经济建设的迅速发展,真空技术也得到更广泛的应用。新颖的现象我们生活在大气中,在大气中从事生产劳动,进行科学实验,对于大气中的现象都很熟悉。而真空比大气压强低,有的竟然小于10~(-8)乇,叫超高真空;有的在10~(-3)～10~(-8)乇,叫高真空;就是所谓“低真空”,它的压强也还是很低,一般是低于大气压到10~(-3)乇之间。那么,在真空环境内会出现什么新的现象呢?在真空中,每立方厘米的分子数比大气下减少了很多,大气中每立方厘米有2.7×10~(19)个分子,而
Vacuum technology is an indispensable part of modern science and technology. With the rapid development of national defense and economic construction, vacuum technology has also been more widely used. Novel phenomena We live in the atmosphere, engage in productive labor in the atmosphere, conduct scientific experiments, and are familiar with the phenomena in the atmosphere. The vacuum is lower than the atmospheric pressure, and some are even less than 10~(-8)乇, called ultra-high vacuum; some are in 10~(-3)~10~(-8)乇, called high vacuum; “Vacuum”, its pressure is still very low, generally from below atmospheric pressure to between 10 ~ (-3) Torr. So, what new phenomena will occur in a vacuum environment? In a vacuum, the number of molecules per cubic centimeter is much smaller than that in the atmosphere, and there are 2.7 x 10-19 molecules per cubic centimeter in the atmosphere, and