By the multiple reflections and transmissions in a dielectric on a ferromagnetic metal. color and Kerr rotation correlate with each other. It is revealed that the real refractive index of dielectric plays a major role on the variations of color and Kerr signal. while the absorbing term adjusts the intensive color exhibition and Kerr enhancement at much thinner dielectric thickness. https://www.diegojavierfares.com/amazing-price-Kicker-48CDF104-Comp-10-Down-Firing-Loaded-Subwoofer-Enclosure-special-find/