Consider pulse propagation in a dispersive, isotropic medium
with a refractive index given as a function of vacuum wavelength
lmda0 by: n(lmda0) = nc + a (lmda0/lmdac )^2
Here nc, a, and lmdac are fixed parameters describing the
medium.
a) Derive an expression for the phase velocity of radiation in
this medium, and evaluate your answer for vacuum wavelength lmda0 =
lmdac .
b) Derive an expression for the velocity of a pulse propagating
in this medium, and evaluate your...