【摘要】 用半经典理论讨论处在稳态的系统辐射单一频率问题．作为例子计算了氢原子处于1s和2p叠加态时辐射单一频率（）的能流密度．更多还原

【Abstract】 We discussed the systems of stable states and radiate single frequencywith semi-classical theory of radiation. As example,we calculated the power density ofHydrogen atom which radiate single frequency in a superimposed state of is and Zp.更多还原