The system of several vertical perpendicular lightnings (parallel arms of a single discharge), insert lightning videos slow running along the same path up and down - measure distances between discharges, create a model of an approximate oscilloscope response of such discharge - that is already really a classic AC.
mfumo wa wima umeme perpendicular kadhaa (sambamba silaha ya kutokwa moja), ingiza videos polepole umeme mbio katika njia ya Same juu na chini - kipimo umbali Kati yanayovuja, kujenga mfano wa majibu oscilloscope takriban ya kutokwa kavu - Hiyo ni kweli tayari na classic AC.