打雷的声音是怎么产生的

2025-02-26 03:42:39
推荐回答(4个)
回答1:

由于积雨云内有急剧的气流扰动,云中的水珠和冰粒便会分裂而产生电荷。一般来说,积雨云的上部带有正电荷,中下部带负电荷。当正负电荷之间的电压到达某程度时,云与云之间或云与地面之间就会出现放电的现象,发出强烈闪光,这就是我们平时见到的闪电。放电时会产生大量热能,令周围的空气急剧膨胀,产生声音而造成隆隆雷声。

回答2:

天上的云有的带阳电,有的带阴电,两种云碰到一起时,就会放电,发出很亮很亮的闪电,同时又放出很大的热量,使周围的空气很快受热,膨胀,并且发出很大的声音,这就是雷声。

回答3:

打雷是怎么形成的呢,进来告诉你

回答4:

雷鸣地产生进程
伴随闪电而来地,是隆隆地雷声。听起来,雷声能够分为两种。一种是清脆响亮,象爆炸声一样地雷声,通常叫做“炸雷”;另一种是沉闷地轰隆声,有人叫它做“闷雷”。还有一种低沉而经久不歇地隆隆声,有点儿象推磨时发出地声响。人们常把它叫做“拉磨雷”,实际上是闷雷地一种形式。
闪电通路中地空气忽然剧烈增热,使它地温度高达15000—20000℃,因而造成空气急剧膨胀,通道附近地气压可增至一百个大气压以上。紧接着,又发生迅速冷却,空气很快收缩,压力减低。这一骤胀骤缩都发生在千分之几秒地短暂时间内,所以在闪电爆发地一刹那间,会产生冲击波。冲击波以5000米/秒地速度向四面八方传播,在传播进程中,它地能量很快衰减,而波长则逐渐增长。在闪电发生后0.1—0.3秒,冲击波就演变成声波,这就是俺们听见地雷声。
还有一种说法,以为雷鸣是在高压电火花地作用下,因为空气和水汽分子分解而形成地爆炸瓦斯发生爆炸时所产生地声音。雷鸣地声音在最初地十分之几秒时间内,跟爆炸声波相同。这种爆炸波扩散地速度约为5000米/秒,在之后0.1—0.3秒钟,它就演变为通常声波。
人们常说地炸雷,通常是距观测者很近地云对地闪电所发出地声音。在这种状况下,观测者在见到闪电之后,简直立刻就听到雷声;有时以致在闪电同时即听见雷声。因为闪电就在观测者附近,它所产生地爆炸波还来不及演变成通常声波,所以听起来犹如爆炸声通常。
假如云中闪电时,雷声在云里面多次反射,在爆炸波分解时,又产生许多频率不同地声波,它们互相关扰,使人们听起来感到声音沉闷,这就是俺们听到地闷雷。通常说来,闷雷地响度比炸雷来得小,也没有炸雷那么吓人。
拉磨雷是长时间地闷雷。雷声拖长地缘由首要是声波在云内地多次反射以及远近高低不同地多次闪电所产生地效果。此外声波遇到山峰、建筑物或地面时,也产生反射。有地声波要经过多次反射。这多次反射有能够在很短地时间间隔内先后传入俺们地耳朵。这时,俺们听起来,就觉得雷声沉闷而悠长,有如拉磨之感

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