4. In polarization-spectroscopy experiments, scientists commonly excite a medium with x- or y-polarized light that "saturates" (decreases) the ab- sorption coefficient for, say, the x-polarization, but not y. As a result, the medium will have different absorption coefficients for x and y polariza- tions (call them a, and a,). This is called "induced dichroism." If a 45°- polarized light wave enters the medium, which has a thickness, L, write down a formula for what the transmitted electric field will be. Show that such a medium rotates the polarization of this beam. Write down a Jones vector for the transmitted beam and a Jones matrix for the medium. matrices. It Le E = E₁₂ e