KnowraRefractive indexLinked fromLinked fromThe 99 pages that link to Refractive index, each with the reason it gives.All 99Broader topic 2Related 88Narrower topic 5Compared with 4BirefringenceNarrower topic: Birefringence is the difference between refractive indices experienced by different light modes.Atmospheric refractionNarrower topic: Differences in air’s refractive index make light change direction across atmospheric layers.Brewster angleNarrower topic: The two media's indices determine the Brewster angle.Negative-index metamaterialNarrower topic: A negative effective value defines this material's distinctive wave behavior.Photonic metamaterialNarrower topic: Metamaterials extend the possible effective values and signs of this familiar optical quantity.