tanks a single cosmic ray can produce a particle shower that stretches over several square kilometers and a small ten you said it. acted different contain is. but is not the only way how we can figure out. when the particles go from the atmosphere. so you have this energy stored in the air. which is later shown as a light so if your eye was more sensitive you could see a flash of light going through the sky in another flash another from because our eyes are not sensitive enough we need to use so-called fluorescent detectors which take a movie of the sky very very fast moving a disk i. think. esther