1. The problem statement, all variables and given/known data A laser provides pulses of EM radiation in vacuum lasting 7.47* 10-12 s. If the radiant flux density is 2.65 * 1020 W/m2, determine the amplitude of the electric field (x *1011) of the beam. Units are required as listed in instructions. 2. Relevant equations Irradiance = c*ε0/2 * E02 3. The attempt at a solution If I solve for E0, I end up with: 4.47*1011 V/m2. My question is that I did not use the time that the question gave me. All I did was plug into the irradiance equation and solve for E0. Is this correct?