This substance has a high refractive index, meaning the speed of light passing through it is greatly reduced.

这种物质的折很高，意味着光穿过它的速度会大幅降低。

Now, when light enters glass, it's a different refractive index, so it actually bends the light.

现，当光线进入玻，为它的折不同，所以它实际上会弯曲光线。

To combat this rain visibility problem, 3M actually developed these elements, which are retroreflectors that have different refractive indices.

为了解决雨天能见度的问题，3M 公司实际上开发了这些元件，它们是具有不同折的逆反器。

And on this side, we have elements that have a 2.4 refractive index and work better in wet conditions.

而另一侧，我们有折为 2.4 的元素，它们潮湿条件下表现更好。

So on this side, we have elements that have a refractive index of 1.9, and they work well in dry conditions.

这一侧，我们有折为 1.9 的元素，它们干燥条件下表现良好。

In other words, the higher the index of refraction, the smaller the angle.

换句话说，折高， 角度来小。

Technically, this changes the index of refraction, but in plain English that means blue light is no longer bent the right way.

从技术上讲，这会改变折，但用简单来说，这意味着蓝光不再以正确的方式弯曲。

And when a ray enters a medium with an increased index of refraction, the angle of refraction decreases.

当具有高折的介质光线通过，折角减小。

For example, when you shine an x-ray through glass, the index of refraction really is smaller than one.

例如，当您用 X 线照玻，折实际上小于 1。

Or to put it shortly, the index of refraction depends on how much the light resonates with charges in the material.

简而言之，折取决于光与材料中电荷的共振程度。

Snell’s Law says that angles of refraction are determined by the index of refraction for each medium and the angle of incidence.

斯涅尔定律指出，折角由每种介质的折和入角决定。

Snell's Law says that angles of refraction are determined by the index of refraction for each medium and the angle of incidence.

折定律说折角由每种介质的折和入角决定。

Like polarization, how scattering works and how an index of refraction works.

与偏振一样，散如何工作以及折如何工作。

This right here is the first key idea with the index of refraction.

这是折的第一个关键概念。

The angle of refraction inside the glass would be less than theta one, since the index of refraction of glass is greater.

玻内部的折角小于theta1，为玻的折更大。

Once you understand that an index of refraction depends on resonance, you can start to see why something like this might happen.

一旦您了解折取决于共振，您就可以开始理解为什么会发生这样的事情。

The index of refraction for a certain medium is the ratio of the speed of light in a vacuum versus the speed in that medium.

介质的折是光真空中的速度与其该介质中的速度之比。

So where the retroreflectors act ideally under dry conditions, as soon as water is on top of them, their refractive index is lowered by a ratio of 1.33.

此，当反器干燥条件下理想工作，一旦水覆盖其上，它们的折就会降低到 1.33 的比例。

And then because many successive shifts to the phase like this are the same thing as light slowing down, this will ultimately explain the index of refraction.

然后为像这样的许多连续的相位变化与光减速是一样的，这最终将解释折。

This is what Mithana explores in her videos on the index of refraction over on Looking Glass Universe, which you should definitely look at.

这就是 Mithana Looking Glass Universe 上关于折的视频中探索的内容，您绝对应该看看。