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

这种质的折射率很高，意味着光穿过它的速度会大幅降低。

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，这会改变折射率，但用简单来说，这意味着蓝光不再以正确的方式弯曲。

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

句话说，折射率越高， 角度越来越小。

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

具有高折射率的介质光线通过时，折射角减小。

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，折射角由每种介质的折射率和入射角决定。

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

玻璃内部的折射角小于theta1，因为玻璃的折射率更大。

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

折射定律说折射角由每种介质的折射率和入射角决定。

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.

介质的折射率是光在真空中的速度与其在该介质中的速度之比。

The new glass he created was softer and easier to decorate, and had a higher refractive index, adding to its brilliance and beauty, and it proved invaluable to the optical industry.

他创造的新玻璃更柔软， 更容易装饰，折射率更高，增添了它的光彩和美丽，事实证明，它对光学工业来说是无价的。

" In addition, refractive index can also be used to 'invisibility', for example, objects with high borosilicate glass materials can also be 'invisible' when moving in glycerol with a refractive index close to its own, " Chu noted.

“此外，折射率也可以用来‘隐形’，比如高硼硅玻璃材料的体在折射率接近自身的甘油中运动时也可以‘隐形’，”褚指出。

But, if light reflects off of a surface that has a lower index of refraction than the medium it's passing through, there is no phase shift, and the wave then constructively interferes with itself.

但是，如果光从折射率低于其通过的介质的表面反射，则不会发生相移，然后波会对其自身产生相长干涉。

This is actually one of the principles of realizing the " invisible cloak" , when the fabric of a garment and the air refractive index are the same, people can be freely " invisible" after wearing it, said the expert.

这位专家说，，这其实也是实现 “隐形斗篷”的原之一，一件衣服的面料与空气折射率相同时，人穿上后就可以自由 " 隐形" 。