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

这种物质的率很高，意味过它的速度会大幅降低。

" 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，率也可以用来‘隐形’，比如高硼硅玻璃材料的物体率接近自身的甘油中运动时也可以‘隐形’，”褚指出。

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，率更高，增添了它的彩和美丽，事实证明，它对学工业来说是无价的。

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”的原理之一，当一件衣服的面料与空气率相同时，人上后就可以自由 " 隐形" 。