What would a negative index of refraction look like?

如果折射率是负的,会发生什么事情?

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The negative index interpretation was soon challenged, however.

不过这项对于负折射率的诠释很快就受到质疑。

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Within the coupled resonant frequency region, the negative index of refraction can be achieved.

在负的磁导率和负的介电常数重叠的频率区域，能得到一个负的折射系数。

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On the other hand, continued large investment gains helped 12 charities generate a negative index number--surpluses exceeding all donations for the reporting year.

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Price returns for the Barclays Municipal 10-year Index were negative seven out of 13 years.

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The index was predicted to ease by less than two points from 5.3 in July, but in the event a sharp downturn in the expectations gauge between both private and institutional investors caused a dramatic slump in the index to negative 13.5 and the lowest reading since September 2009.

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