Question

A time keeper in a 100 m run is advised to start

the stop watch by seeing the smoke from the starter's

gun and not by hearing the sound of fire. Why ?​

Answer 1

Answer:

Sound travels much more slowly than light. This is why people timing sprints will always look for the puff of smoke from the starting pistol and not wait until they hear the bang before they start their stopwatches.

Answer 2

Answer:

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