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Ours is the first rigorous derivation of ray optics equations which include all sub-leading order terms, some of which are also new to the physics literature. While the ray optics limit we prove initially (Theorem 3.3) applies to photonic crystals of any topological class, we also consider ...
Bragg’s law states the relationship between the angle at which the maximum intensity of X-rays gets diffracted to the wavelength and the distance between the atoms. Basically, the law explains the relationship between an x-ray light shooting into and i