物理学中有一些物理量,在各章节中经常要用到。如周期和频率,在圆周运动,振动和波,交流电,电磁振荡,光的本性,原子物理等内容中,既有共性,又有个性。在教学中如能掌握共性,熟悉个性,就能起到事半功倍的作用。高中阶段,在《曲线运动》一节中,周期首次出现: 做圆周运动的物体运动一周所用的时间叫做周期。匀速圆周运动的周期是恒定不变的。 There are some physical quantities in physics that are often used in various chapters. Such as cycle and frequency, in the circular motion, vibration and wave, alternating current, electromagnetic oscillation, light nature, atomic physics and so on, both commonalities and personalities. If you can grasp commonalities and become familiar with your personality in teaching, you can play a multiplier role. In the high school phase, the cycle appears for the first time in the section “Curve Movements”: The time it takes for a body to make a circular motion to exercise one week is called a cycle. The cycle of uniform circular motion is constant.