“energy level”的概念、定义、习题解题方法及翻译-物理辞典

单词	energy level
释义	energy level A definite fixed energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have. In an atom, for example, the atom has a fixed energy corresponding to the orbitals in which its electrons move around the nucleus. The atom can accept a quantum of energy to become an excited atom (see excitation) if that extra energy will raise an electron to a permitted orbital. Between the ground state , which is the lowest possible energy level for a particular system, and the first excited state there are no permissible energy levels. According to the quantum theory, only certain energy levels are possible. An atom passes from one energy level to the next without passing through fractions of that energy transition. These levels are usually described by the energies associated with the individual electrons in the atoms, which are always lower than an arbitrary level for a free electron. The energy levels of molecules also involve quantized vibrational and rotational motion
随便看	zwitterion coherent units coinage metals coincidence circuit cold emission cold fusion Coleman-Gross theorem collective excitation collective oscillation collector colliding-beam experiments colligative properties collimator collision density colloids cologarithm colorimeter colour colour charge colour photography colour television colour temperature coma combinations combined cycle

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。