“field emission”的概念、定义、习题解题方法及翻译-物理辞典

单词	field emission
释义	field emission The emission of electrons from cold metals by electric fields. In order to build up sufficiently large electric fields, the metal is usually shaped to a sharp needle point. Field emission is an example of the tunnel effect in quantum mechanics, with an electron in the metal being in a potential barrier. In field emission the probability of tunnelling, which can be calculated using the semiclassical approximation, is related to the work function of the metal. An important application of field emission is the field-emission microscope
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。