 The same situation pertains if a very short transmission line is inserted between the generator and the open circuit.If, however, a longer line with a characteristic impedance of formula_10 and noticeable end-to-end delay is inserted, the generator – being initially matched to the impedance of the line – will have formula_22 at the output.But after an interval, a reflected transient will return from the end of the line with the "information" on what the line is actually terminated with, and the voltage will become formula_24 as before.