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. Wey?

Explanation

To understand why a timekeeper in a 100 m run is advised to start the stopwatch by seeing the smoke from the starter's gun rather than hearing the sound of the gunfire, we can break down the reasoning step by step.

### Step-by-Step Solution:

1. **Understanding the Scenario**: In a 100 m race, the starter fires a gun to signal the beginning of the race. The timekeeper is positioned at the finish line and needs to accurately start the stopwatch when the race begins.

2. **Speed of Sound vs. Speed of Light**:
- The speed of sound in air is approximately 330 meters per second. This means that if the timekeeper waits to hear the sound of the gun, there will be a delay before they can start the stopwatch.
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