Homework Statement
The index of refraction is given by
n^2 = (N q / ε m) (1 / (ω0^2 - ω^2 + iγω))
Where N is the electron density, q is the charge of an electron, ε is the permittivity of free space, m is the mass of an electron, ω0 is the resonant frequency, ω is the incident frequency...