Sat March 17, 2012 By: Apoorva Ramki

what is refractive index

Expert Reply
Sat March 17, 2012
Refractive index of a medium is defined as the ratio of speed of light in vacuum to the speed of light in the medium. A medium with higher value of refractive index is said to be optically denser compared to a medium with lower value of refractive index.
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