I am having trouble figuring how the info given relates to electric and magnetic fields. 1. The problem statement, all variables and given/known data A laser emits 1.38x10^18 photons per second in a beam of light that has a diameter of 1.96 mm and a wavelength of 518.0 nm. Determine each of the following for the electromagnetic wave that constitutes the beam. (a) the average electric field strength in N/C (b) the average magnetic field strength in T 2. Relevant equations E = F/q for electric field F = qvB sin(theta) for magnetic field E=hf=hc/lambda for energy of a photon 3. The attempt at a solution i solved for E the energy of a photon: h*c/(518x10^-9m) = 3.84x10-19 Joules I am not just some slacker begging for an answer; i have a high B in this class! i don't see how in the world the concept of the photoelectric effect can relate to electric and magnetic fields if i don't know q, F, B. I am completely lost here - someone please help!!!