Metamaterials can be designed to rotate light as it passes throughthem. If the effect is strong enough, it can lead to the materialhaving a negative index of refraction and light bouncing around verydifferently than expected.
CITATION STYLE
Wegener, M., & Linden, S. (2009). Giving light yet another new twist. Physics, 2. https://doi.org/10.1103/physics.2.3
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