To explain the shape of figures is probably quite sufficient mechanical resonance and interference, even though sometimes it may not look like that. Also, may occur more complex electromagnetic interferences and reflections, (ie also light and heat - infrared) waves, propagating at the speed of light, and various phase boundaries between some of these media: plasma - shock wave - pressure wave - air, their phase interface is moving at speeds comparable to the sound, ie million times slower.
Kuelezea sura ya takwimu ni pengine kabisa kutosha mitambo resonance na kuingiliwa, ingawa wakati mwingine inaweza kuangalia kama hiyo. Pia, inaweza kutokea mwingiliano electromagnetic ngumu zaidi na tafakari, (yaani pia mwanga na joto - infrared) mawimbi, kuikuza kwa kasi ya mwanga, na mipaka mbalimbali ya awamu ya Kati na baadhi ya vyombo vya habari Theses: plasma - mshtuko wimbi - Mganda shinikizo - hewa, wao awamu interface ni kusonga kwa kasi kulinganishwa na sauti, yaani polepole mara milioni.