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课题的引出教师 B:我们将开始《机械波》的教学,在备课前,一起来交换一下意见。教师 C:我想通过水波、绳子波、螺旋弹簧圈波等演示,来引出机械波的概念。教师 B:这部分内容学生不容易正确理解,通过日常生活中的事例,通过演示,引出—课题,帮助学生理解概念,更为必要。课文也作了这样的安排。为便于观察,演示时,绳子要适当长些,弹簧圈数也要适当多些;振源的振动次数要适当控制,以防止波传到末端反射回来所造成的影响。关于绳子波的实验,我将让学生分成几个小组,上课时在教室内的走廊中由他们自己做,这样
Leading teachers in the subject B: We will begin the teaching of “Mechanical Waves” and exchange opinions before preparing lessons. Teacher C: I want to introduce the concept of mechanical waves through demonstrations such as water waves, rope waves, and spiral spring waves. Teacher B: This part of the content of students is not easy to correctly understand, through the examples of daily life, through the presentation, leads to - topics, to help students understand the concept, more necessary. The text also makes such an arrangement. For the sake of observation, during the demonstration, the rope should be longer and the number of spring turns should be more appropriate; the number of vibrations of the vibration source should be properly controlled to prevent the wave from passing to the end and reflecting back. With regard to the experiment of the rope wave, I will divide the students into several groups and make them themselves in the corridors of the classroom during class.