in these formulas, it is useful to understand which variables are parameters that specify the nature of the wave. the variables e0 and b0 are the of the electric and magnetic fields. choose the best answer to fill in the blank. view available hint(s)for part a in these formulas, it is useful to understand which variables are parameters that specify the nature of the wave. the variables and are the of the electric and magnetic fields.choose the best answer to fill in the blank. maxima amplitudes wavelengths velocities