Respuesta :
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:
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:-
[tex]n = \displaystyle{ \frac{c}{v} }[/tex]
Where,
c is the speed of light and v is the phase velocity of light.