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在高二物理教材中有十多个演示实验。这些实验,有的没有现成的仪器可用,有的操作比较困难,但是从讲清教材,帮助学生掌握知识来说,却都是很重要的。另外,根据教学上的需要,还要补充一些实验,和进行一些当堂边讲边做的实验。究竟怎样做这些实验,今把我个人在教学中的体验介绍如后。 1.弹簧振子实验。弹簧振子,一般没有现成的仪器,实验时可利用向心力演示器,取下一个较小的球,用另一个较大的,然后拴上一根螺旋弹簧,弹簧要软一些,既能伸长,又能压缩。演示时由于存在摩擦的关系,只能振动几次,但用来说明F=-Kx这个规律,还是比较明显的。 2.振动图线实验。这个实验,要应用砂摆,但如
There are more than ten demonstration experiments in high school physics teaching materials. These experiments, some of which are not available in the instrument available, and some more difficult to operate, but to clarify the textbooks to help students master the knowledge, it is very important. In addition, according to the teaching needs, but also to add some experiments, and to carry out some of the labors to do while talking about the experiment. How to do these experiments, now my personal experience in teaching as introduced. Spring oscillator experiment Spring vibrators, generally do not have ready-made instruments, the experiment can be used to the heart of the demonstrator, remove a smaller ball, with another larger, and then tied a coil spring, the spring should be soft, both elongation, and Can be compressed. Demonstration due to the existence of friction, can only vibrate a few times, but used to illustrate the law of F = -Kx, or more obvious. Vibration graph experiment. This experiment, to apply sand pendulum, but as