【摘要】 把打点计时器用于弦振动研究，具有放大波形的效果，同时使实验的测量值更趋于准确．并且同一实验用两种不同的仪器完成，开拓了学生的思维，把比较教学法直接用于实验教学，培养了学生科学的实验方法．更多还原

【Abstract】 The vibration of a chord is studied by using the printing point timer which can amplify the wave form of the chord. The results of this experiment are more accurate,moreover this experiment is done by using two different instruments which can develop students’ thinking and can train the scientical test methods of students by using the comparative teaching method directly to test teaching.更多还原