1. The problem statement, all variables and given/known data A window, 1.0m by 1.0m receives 27J of energy, from sunlight, in one minute. What is the Rms magnetic field of the light striking the window. 2. Relevant equations E = cB I = (ErmsBrms) / μo 3. The attempt at a solution Not sure if those equations are right when solving this problem and cant find a problem similiar to it....completely stuck. Do I use Poynting's vector?