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Sagot :
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.
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