Physics is a science that studies the basic forms, properties, movement and transformation, and internal structure of matter in the universe, so as to understand the basic laws of the components of these structures and their interactions, movement and transformation. Physicists try to find the basic laws of all physical phenomena, so as to understand all physical phenomena in a unified way. Although this effort has gradually made some progress, it is still far from achieving this goal. It seems that people's exploration and research on the objective world is endless.