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在野外勘探,山高路远,地质队员从这山到那山,要走多少路呢?他们有自己的测量方法。他们放开嗓门向对面大山高声喊道:“你——有——多——远?”然后默默数数,听传来的回声,他们用耳朵听,就能估算出距离,这是怎么回事呢?原来,在空气中,声音传播的速度大约是每秒340米。根据这个道理,地质队员们利用回声传回的时间,就能估算出他们与对面高山相隔多远。
In the field of exploration, mountain road far, geological team from the mountain to the mountain, how many roads to go? They have their own measurement methods. They shouted to the opposite mountain shouted: “You - there are - more - far?” And then the number of silence, listen to the echo, they listen to the ears, you can estimate the distance, which What is going on? It turned out that in the air, the speed of sound is about 340 meters per second. According to this principle, geologic team members can use the time of echo to estimate how far they are from the opposite mountain.