1. The problem statement, all variables and given/known data A z-polarized incident EM waves hits a small charge (-q) bounded to a massive charge (+q) with spring constant k0 and frequency ω. (a) Write down the equation of motion (b)Find time averaged total power dissipated. (c) Find classical scattering cross section σ (thomson) (d) Find value of E0 that makes magnetic forces non-negligible. 3. The attempt at a solution Part (a) and (b) Part(c) Part (d) Because velocity of particle is slow, so magnetic force on it is low, giving it a small magnetic displacement compared to the electric displacement. I related equated magnetic displacement to electric displacement to find a value of E0.