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不敲自鳴的大钟三国时代,魏国宮殿前的一口大钟,有一次无緣无故地响了起来,吓得朝野惊惶不安。有人去問博物家張华(公元232—300年)。当时四川有座銅山崩塌。張华认为大钟自己响起来是由于銅山崩塌造成大钟共鳴的緣故。我們知道,声音是由于物体在空气中振动而产生的。任何物体在空气中振动时,都会产生一定頻率(每秒钟振动的次数)的振动波,
In the Three Kingdoms era that did not knock on the bells, a large bell in front of the Wei State Palace once rang out for no reason and was scared and terrified by the opposition. Someone asked the Chinese artist Zhang Hua (232-300 AD). At that time, there was a collapse of Tongshan in Sichuan. Zhang Hua believes that the bell itself sounded due to the resonating of the clock due to the collapse of Tongshan. We know that sound is caused by the vibration of an object in the air. When any object vibrates in the air, it will generate vibration waves with a certain frequency (the number of vibrations per second).