首先，我们需要知道，入射到气体原子的光子的能量。

The first that we need to know the energy of the photon that's incident on our gaseous atom.

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结果表明：组成一维二元光子晶体的折射率、厚度、层数、入射角、光源的偏振态等都对透射特性有影响。

The results show that the factors are the refractive index thick ness layer number of one-dimensional dual photonic crystal polarization and incident Angle of incident ray.

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笔者指出，当入射引力波和高斯束不同频率时，高斯束谐振系统产生的一阶扰动光子流没有观测效应。

This paper points out that the first-order perturbation photon flux produced by this system has not observed effect when GWs is different from frequency of Gaussian beam.

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The first that we need to know the energy of the photon that's incident on our gaseous atom.

首先，我们需要知道,入射到气体原子的光子的能量。

麻省理工公开课 - 化学原理课程节选

So, we do this here for the photoelectric effect, and in terms of the photoelectric effect, what we know the important point is that the incoming photon has to be equal or greater in energy then the work function of the metal.

所以，我们做这个是为了说明，光电效应，在光电效应方面，我们知道的最重要的事情,就是入射的光子能量必须等于,或者大于金属的功函数。

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