1. The problem statement, all variables and given/known data A transmission line is 1 meter and has a relative dielectric constant of 2.25 Find the phase velocity u and the wavelength λ for a frequency of 50 MHz. 2. Relevant equations λ=???(ε_r, f) u=λf 3. The attempt at a solution I am unable to get from the relative dielectric constant and frequency to the wavelength. I could not find any such equation in my text. My guess is the transmission line datum is extraneous, but I could be wrong.