Have you ever watched fireworks? You always see their wonderful colours before you hear their loud sounds. This is because light travels faster than sound. ... These vibrations, or 'sound waves', are then heard as thunder.
Many historians believe that fireworks originally were developed in the second century B.C. in ancient Liuyang, China. It is believed that the first natural "firecrackers" were bamboo stalks that when thrown in a fire, would explode with a bang because of the overheating of the hollow air pockets in the bamboo.
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