Question #e9c3f

1 Answer
May 6, 2017

High frequency sound .


See we need to know first that the window panes cannot be broken by wind , so in usual scenario we see that lightening produces sound , which is very loud and of high frequency .

Every glass has fixed frequency for which they can vibrate ,if the frequency increases that they cannot further vibrate they simply break up .

example we can see people breaking glass with there voice , this is similar phenomenon .