一、两个独立光源为何不相干?薄膜干涉实验中,相干光又是如何获得的?通常的独立光源不相干的原因是:光的辐射一般是由于原子的外层电子激发后自动回到正常状态以光的形式放出能量所形成的.原子的辐射过程是杂乱无章而且常常中断,持续时间短,即使在极度稀薄气体发光情况下,单个原子辐射的持续时间也不超过10~(-8)s.当某个原子辐射中断后,它自身或者其他的原 Why are two independent light sources incoherent? How does coherent light get in thin-film interference experiments? The reason why a common independent light source is irrelevant is that light radiation is generally due to the automatic return of an atom’s outer electron to its normal state. The state emits energy in the form of light. The radiation process of atoms is disorderly and often interrupted with short duration. Even in the case of extremely thin gas illumination, the duration of radiation of individual atoms does not exceed 10~(-8)s. When an atomic radiation breaks, it’s itself or something else