Question

why we hear a sound of cracker a littel later after seeing the cracker brust

Answer 1

Explanation:

cracker burst and hearing the sound later is because the speed of sound and light. Speed of light is in the vicinity of 3*10^8m,/ sec while the speed of sound is at a distance of 332m/sec. It is similar to lightning that strikes before the sound.

Answer 2

Answer:

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Then there were dear little crackers, very small and slender, just made for Bay, though it is ... gave a howl so loud and clear that we all started, and ran to see what was the matter.