1. The problem statement, all variables and given/known data Hi, here is the problem I'm having trouble with: The rms value of the magnitude of the magnetic field in an electromagnetic wave is Brms = 0.137 T. The intensity of this wave is approximately... 2. Relevant equations E = cB I = (ErmsBrms) / [itex]\mu[/itex]0 3. The attempt at a solution E = (3 x 108)(0.137 T) = 4.11 x 107 V/m I = ((4.11 x 107 V/m)(0.137 T)) / (4[itex]\pi[/itex] x 10-7) = 4.47 x 1012 W/m2 I keep re-doing this problem and I keep coming up with that same answer, but it is not one of the answer choices. Can anyone give me a clue as to what I'm doing wrong? Thanks, I appreciate it.