Concept explainers
In the stands of a racetrack, you notice smoke from the starter’s gun before you hear it fire. Explain.
To Explain:Smoke is seen from the starter’s gun before one hears it.
Explanation of Solution
Introduction:
Light is a transverse wave, which has a speed nearly
Since the speed of light is much more than that of sound, the smoke from the gunfireis visible before the sound is heard. Therefore, one can see the light before one can hear its sound.
Conclusion:
Since light travels faster than sound, one can see the smoke from the gun before hearing the gunfire.
Chapter 26 Solutions
Conceptual Physics: The High School Physics Program
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