In an EM wave traveling west, the B field oscillates vertically and has a frequency of 80.0kHz and an rms strength of 7.75 × 10−9T. What is the peak strength of the Electric Field. So I worked this problem and got it wrong earlier and am looking for explanation as to why. To Solve this problem, you would multiply the rms strength by 3.00 x 10^8 m/s right? Thanks!