If this distance is large in comparison to the wavelength, this dam simply casts a shadow.
如果这个距离比波长大，那么这个水坝就会投下阴影。
We want to divide all of this by our wavelength, and to keep our units the same we'll do meters.
我们想用波长除以所有这些，而且为了保持单位统一我们采用米为单位。
The precise thickness at which the fibre traps the light depends on the wavelength of that light.
纤维捕捉光束的确切厚度取决于那条光束的波长。
The precise thickness at which the fibre traps the light depends on the wavelength of that light.
纤维捕捉光束的确切厚度取决于那条光束的波长。
If the distance between the wall and the dam was large in comparison to the wavelength, then what happens?
如果墙和坝之间的距离比波长大，那么会导致什么？
De Broglie, 1924, in his PhD thesis says, if an electron has wave-like properties, this would be its wavelength.
1924年德布罗意在他的博士毕业论文中说道，如果一个电子具有类似波的性质，这就是它的波长。
Since we have my red laser pointer, we will also try with the red laser pointer, which is centered at wavelength of 700 nanometers.
因为我们有我的红色激光笔，我们也会尝试红色激光笔，它的中心波长是 700纳米。
All substances, all forms of matter, can be distinguished according to what wavelength of light they absorb and which ones they reflect.
所有形式的物质，都可以根据它们吸收的光的波长以及反射的光的波长来区分。
Just remember that violet light is the end that actually has the shortest wavelength, which means that it also has, of course, the highest frequency.
只要记住，紫色光在末端，实际上，它有最短的波长，意味着它当然也有最高的频率。
The assumption of constant relative humidity is important, because water vapor in the atmosphere is another efficient absorber of radiation at infrared wavelength.
相对湿度恒定的假设是重要的，因为大气中的水蒸气是红外波长辐射的另一种有效吸收剂。
I am sure you all know from physics class about how light moves in microscopic ways and that we can only see light when the wavelength of that light is in a specific range.
我相信，你们在物理课上都学过光是如何以微观的方式运动的，以及只有在光的波长在特定的范围内时我们才能看到光这一事实。
This fascinating experiment showed that plants not only detect and react to specific wavelengths of light, plants can also detect and react to changes in the ratio of one wavelength to another.
这个有趣的实验表明，植物不仅能探测和对特定波长的光产生反应，还能探测不同波长比率的变化并对其做出反应。
These effects, Catchpole says, "are usually very sensitive to wavelength.
卡崔布尔说：“这些光谱效应经常随波长而变。”
This wavelength corresponds to one of the best Windows in the atmosphere.
该波长正处于大气最佳窗口之一。
This is because the wavelength of visible light is longer than 200 nanometres.
因为可见光的波长大于200纳米。
We have a UV lamp right here, which is centered at a wavelength of 254 nanometers.
我们有一个紫外灯在这里，波长集中在254纳米处。
The wavelength, and hence the colour, of this light depends on the size of the dot.
光线的波长——即是对应着其颜色——取决于该微粒的尺寸。
The longest wavelength, 22 micrometers, is shown in red, capturing larger dust grains.
波长最长的达22微米的红色显示的是捕捉到的较大的宇宙尘埃颗粒。
He went to a bar, in the bar, a short wavelength radio was broadcasting pop music.
酒吧里一台短波长的收音机正在播放流行音乐。
Those lasers produce one wavelength of light that doesn't stop unless the power is cut.
这些激光器产生一个具有波长的光，它不会停止，除非电源被切断。
So cones hit by underwater rays are primed to sense longer-wavelength yellow light.
因此从水面下的锥体对长波黄光敏感而水面上的锥体对短波绿光敏感。
Neutralhydrogen emits radiation on a characteristic 21cm wavelength, while ionisedhydrogen does not.
中性氢辐射出离子化氢所没有的特有的21厘米波长。
The power of a light microscope is limited by the wavelength of visible light, which is about 500 nm.
光学显微镜的放大倍数受限于可见光的波长，大约500纳米。
Neutral hydrogen emits radiation on a characteristic 21cm wavelength, while ionised hydrogen does not.
中性氢辐射出离子化氢所没有的特有的21厘米波长。
"We let the molecule interact with a laser light with a very specific wavelength, or color," she says.
“我们让分子与特定波长的激光灯相互作用，”她说。
A decreased frequency is equivalent to a longer, or redder, wavelength. This is gravitational redshift.
较低了的频率，相当于较长或较红的波长，这就是红移。
In many cases, if you want to produce a particular wavelength, you have to build a laser to accomplish this.
在大多数情况下，如果你想产生一些特定波长的激光，你必须为此建造多个不同的激光器来完成任务。
Instead, a single wavelength can be selected to produce the X-ray equivalent of a pure-colour beam of light.
事实上单独某一个波长的射线就可以产生好象一束单色光一样的纯净的伦琴射线。
The quantum seas part, and a laser at the wavelength that should have been absorbed passes through unfettered.
大量的量子进行分离，在这个本应被吸收的波长上的激光束便毫无阻挡地通过。
Only then was it recast in less fleeting terms: as a multiple of the wavelength of a particular type of light.
就在那时，人们用更加稳定的表述来定义这个概念，比如使用某一特定光的波长倍数。
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