Question

what is refractive index of solid​

Answer 1

Almost all solids and liquids haverefractive indices above 1.3, with aerogel as the clear exception. Aerogel is a very low density solid that can be produced with refractive index in the range from 1.002 to 1.265. Moissanite lies at the other end of the range with arefractive index as high as 2.65
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