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实验材料:两只薄壁葡萄酒杯、肥皂、铁丝。实验步骤:1.把两只薄壁葡萄酒杯并排摆放在桌子上。2.用肥皂把手洗干净,然后用潮湿的食指,缓慢地顺着一只杯沿运动。这时,你会听见一种响亮而美妙的声音。手指摩擦玻璃杯,玻璃杯会受到微小的冲击,开始颤动,并波及周围的空气。声波还会传递到第二只杯子上。在第二只杯子上搭一根细铁丝可以印证这一点。
Experimental materials: two thin-walled wine glasses, soap, wire. Experimental steps: 1. The two thin-walled wine glasses placed side by side on the table. 2. Wash hands with soap, and then use moist index finger, slowly along a cup along the exercise. At this moment, you will hear a loud and wonderful sound. Rubbing the glass with your fingers, the glass will be slightly affected and begin to vibrate and affect the surrounding air. Sound waves will be passed on to the second cup. Take a thin wire on the second cup to confirm this.