If angle of incidence=90, then\xa0angle of refraction=?
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To answer this, one must know the mediums of incidence & refraction. then the below formula can be used:n1 * sin A\xa0= n2 * sin Bwhere A is the angle of Incidence & B is the angle of Refration. Also, n1\xa0is the index of refraction for the material the incident light ray is traveling through, and\xa0n2\xa0is the index of refraction for the material the refracted light ray is traveling through.