It's the deepavali time !!!
Our neighbor's son is busy in blasting the firecrackers from morning 5 .....
His crackers are making loud noise than producing light....
Why is it so ??
The core ingredient in many firecrackers is gunpowder, combustion mixee made of potassium nitrate , charcoal and sulphur.
When ignited these elements burn rapidly and release intense heat. This sudden heat causes, gases trapped inside, to expand at high speed building extreme pressure until it bursts.
The loud boom what we hear is actually a shock wave.
When hot gases escape at lightning speed, they push surrounding air molecules outward. It creates a pressure wave. This wave travels quickly through air producing sound of " blast ".
Fireworks paint the sky with colours. Each colour comes from a specific metal.
Copper creates blue
Strontium creates red
Sodium creates yellow
Barium creates green
When these metals burn, their atoms emit light at different wavelengths , resulting in brilliant colours across the sky !!!
