refractive index

created by Kawika
(thing) by Kawika (3 y) (print)   (I like it!) Thu Jul 12 2001 at 9:22:59
The refractive index (RI) of a medium is defined as the ratio of the velocity of light (in a vacuum) to that in the medium.

In relation to optical mineralogy:
The RI varies with wavelength (a property called dispersion), but the variation is usually small for transparent minerals.

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