The refractive index is a term used to measure how light or radiation propagates through a medium. In plasma, it is considered for the filamentation process, where filamentation focuses on high power laser pulse. Calculate the plasma refractive index based on the given values.

Formula

η = [1-(vp/v2)]12

Where,

η = Plasma Refractive Index

vp = Plasma Frequency

v = Frequency