Question

le=" \textbf{What do you mean by Refractive Index ?}" alt=" \textbf{What do you mean by Refractive Index ?}" align="absmiddle" class="latex-formula">

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Answer 1

Rarefaction is the reduction of an item's density, the opposite of compression.

Rarefaction is the reduction of an item's density, the opposite of compression.

Answer 2

Answer:

The Refractive Index (RI) is defined as the ratio of the speed of light in a vacuum to its speed in the sample medium.

Formula:-

$n = \displaystyle{ \frac{c}{v} }$

Where,

c is the speed of light and v is the phase velocity of light.