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speed of light in metamaterials

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No, I think that speed of em wave in metamaterials like em in natural materials with the same n, but direction of em is difference
 

tung-crd-lab said:
No, I think that speed of em wave in metamaterials like em in natural materials with the same n, but direction of em is difference
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Thank, but some metamaterial have negative n which mean the light must travel faster!
 

No, it does not mean that at all. The "negative n" refers to Snell's law of waves incident on a media. The wave bends in a way that looks like the media has a negative n.
 

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