1. The problem statement, all variables and given/known data a transmission line has a length l of 0.4lambda. find the phase change Bl that occurs down the line. 2. Relevant equations B x lambda= 2pi 3. The attempt at a solution now here is my problem i am genuinely not sure where to go with this.i dont want this answered for me that is not the idea of the forum but the next step to get me going on this would be appreciated, i can then post my answer for checking?anyone assist please?