Grom

Grom je zvučni efekat koji nastaje prilikom udara munje. Temperatura zraka u okolini munje dostiže 20.000 °C što proizvodi naglo širenje zraka. Grom je zvučni talas nastao ovim širenjem zraka. Širi se brzinom oko 300 metara u sekundi. Bljesak munje prije se vidi, nego se čuje grmljavina, jer je brzina svjetlosti veća od brzine zvuka. Jačina grmljavine je oko 100 decibela.

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Reference

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Zvuk grmljavine
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