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高中物理《驻波》一节 ,给出了共振法测声波(纵波 )波长的实验 (见图 1) :在盛有水的容器中插入一根粗玻璃管 ,管口上方放一个正在发声的音叉。慢慢向上提起玻璃管 ,当管内空气柱达到一定长度时 ,可以听到空气柱发出较强的声音。这时 ,从音叉发出并进入玻璃管的声波和经水面反
In the high school physics “Standing Waves” section, an experiment was conducted to determine the wavelength of acoustic waves (longitudinal waves) by the resonance method (see Figure 1): Insert a thick glass tube into a container filled with water, and place a sounding sound above the nozzle. tuning fork. Lift the glass tube slowly upwards. When the air column in the tube reaches a certain length, you can hear the air column emit a strong sound. At this time, the sound waves emitted from the tuning fork and entering the glass tube are reflected by the water surface.