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在高中物理必修教材中,日食、月食的知识仅在一道课本练习题中涉及到,作为光的直线传播、影的生成的实例加以考查的。但日食、月食是一种常见的物理现象,学生的求知欲很强。由于教材未作详细介绍,学生存在一些模糊,甚至错误的认识。窃以为,教学中不能就题讲题,有必要对日食、月食的知识作适当介绍,并着力纠正学生的错误认识。1 日食、月食的发生条件食产生的根本原因是影,日、月、地运动到一条直线上时,发生影的覆盖,就产生了食。此时,若月球位于日、地中间,月球阴影落到地球上,发生日
In the high school physics compulsory textbooks, the knowledge of solar eclipse and eclipse is only mentioned in a textbook exercise, and it is examined as an example of the linear propagation of light and the generation of shadows. However, solar eclipses and eclipses are a common physical phenomenon. Students have a strong desire for knowledge. As the teaching materials were not introduced in detail, the students had some ambiguities and even misunderstandings. It is believed that in the teaching, problems cannot be solved in the teaching. It is necessary to properly introduce the knowledge of the solar eclipse and the eclipse, and to correct the misunderstandings of the students. 1 The basic reason for the occurrence of eclipses and lunar eclipses is the shadow. When the sun, moon, and earth move on a straight line, the shadows are covered and food is produced. At this time, if the moon is in the middle of the earth and the earth, the moon’s shadow falls on Earth, and the day of