ESS5
Prof.
Jin-Yi Yu
Flashes
q Usually more than one stroke is needed to
neutralize all negative ions.
qAnother leader, or dart leader, is initiated and a return stroke
follows.
qDart leader moves downward faster than step leader.
qThe process is repeated
about 4-5 times on average.
qIndividual strokes are
almost impossible to detect.
qWe call a combination
of all strokes a lightning flash.