Let us consider the motion of bounded electrons by atoms, which acts as the medium with p. and e. If there exists an incident electric field E 2 E0 cos out, the motion of an electron(position:r, velocityzv) with mass m and charge 6 is given by (31 md: = mw3r | EEO cos wt, (1) where (.00 is the frequency of the harmonic oscillation. Note that we neglect the Lorentz force and self-force of electrons. The refractive index tells us the order of colors as rainbow. How does the order of colors change when tag is inside and outside the visible light range