give 2 examples of events that show that the speep of sound is very much slower than the speed of light

Physics · Middle School · Thu Feb 04 2021

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 1. Thunder and Lightning - A common example that illustrates the difference between the speed of light and the speed of sound is a thunderstorm. When lightning occurs, we see the flash almost immediately if we are nearby, because light travels at approximately 299,792 kilometers per second (in a vacuum). However, the sound of the thunder that accompanies the lightning takes longer to reach our ears because sound travels much slower at about 343 meters per second (in the air at sea level). The time difference between seeing lightning and hearing thunder can be used to estimate the distance of the storm. For every 5 seconds between the flash and the boom, the lightning is approximately one mile away.

2. Starting Pistols in Races - In track and field events, a starting pistol is used to signal the start of a race. Athletes closer to the starting pistol have an advantage if they react to the sound, as sound takes time to travel to those further away. This can be significant in larger venues. To ensure fairness, starting blocks now incorporate speakers to relay the sound of the pistol to each runner simultaneously. The need for such a system underlines the relative slowness of sound compared to light; the flash from the pistol is seen by all runners at virtually the same time, but the sound of the pistol could otherwise arrive at different times for different runners.