Within the visible range of what we can see, you also want to know this relative order that's pretty easy -- most of us have memorized that in kindergarten, so that should be fine.
在可见光的范围内,你们要知道它们排列的,相对顺序,这非常简单,你们在幼儿园的时候。
These are photodetectors, band gap two electron volts, respond to visible light.
这是光电探测器,能带隙为2电子伏,当它反应于可见光。
So, our detection devices are a little bit limited here today, we're actually only going to be using our eyes, so that means that we need to stick with the visible range of the electromagnetic spectrum.
我们今天所有的探测仪器十分有限,实际上我们要用我们的眼睛来观测,这意味着我们只能看到,电磁谱中的可见光区间。
When you want to know if something is transparent to visible light or not, here is the mystery material and here is visible light.
而我们知道,物体是否对可见光透明,这里是神秘的材料,这里是可见光。
A sodium chloride crystal is transparent to visible light.
氯化钠晶体对可见光透明。
And what is going to allow for absorption or some interaction with visible light?
哪些因素会影响吸收,或者与可见光的关系呢?
What is the E of visible light?
可见光的能量是多少?
Why is it transparent to visible light?
为什么对可见光透明呢?
And you have to ask yourself is the energy difference here, the delta E in the electronic states, how does that compare with the E of visible light?
所以我们会问,是由于能量的不同么,例如deltaE在电子能态的不同,那如何把E与可见光联系起来?
So we talked about what we could see with visible light, we said that's actually the Balmer series.
我们已经说过可见光,它是Balmer系。
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