 After a further interval of formula_13 the reflected step arrives at the generator end and the condition of double voltage and zero current will pertain there also as well as all along the length of the line.If the generator is matched to the line with an impedance of formula_10 the step transient will be absorbed in the generator internal impedance and there will be no further reflections.This counter-intuitive doubling of voltage may become clearer if the circuit voltages are considered when the line is so short that it can be ignored for the purposes of analysis.