How Thunder forms? (Simple Experimental way)

     Before that we should know, how lightning forms.  If you want to know about that, kindly visit my previous post.

     While raining we can hear heavy sound from the sky.  We all experienced that sound(thunder) after lightning.  We may think, how sound comes from the sky?

     Let us see the answer, and let us discuss in simple experimental way.  Take a plastic cover, fill it up with air.  Twist the open end in your hand or tie it.  By hitting the cover, we can hear a kind of sound.  We all experienced that but we may not know how the sound produced.  

     While hitting the cover, the air inside the cover get compress very quickly.  And the pressure get increases.  That high pressure breaks the cover.  The air inside the cover rushes out.  And the air continuous to move forward as a wave.  When that wave reaches our ears, we can hear the sound.  

     Another example, we can do this simple experiment by using balloon.

     Thunder is also produced in a same way.  Due to lightning, the temperature of the surrounding air get increases of about 27,000 degree Celsius.  This heated air get compress and increases the pressure of about 10 to 100 times the normal atmospheric pressure.  The compressed air explodes as a wave called shock waves.  When the waves reaches our earth, we can hear a huge sound called Thunder.