In described case act mechanical waves (sound), and it is a similar case, as the difference in the spreading of thunder after lightning below clouds during the normal storm and the lightning from the blue.
Katika kesi Ikielezewa kitendo mitambo mawimbi (sauti), na ni kesi kama hiyo, kama tofauti katika kueneza ya radi baada ya umeme chini ya mawingu Wakati dhoruba ya kawaida na umeme kutoka bluu.