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 constituent elements of these structures and the basic laws of their interaction, movement, and transformation. physicists strive to find the basic laws of all physical phenomena so as to understand all physical phenomena uniformly. although this effort has gradually made progress, it is still far from achieving this goal. it seems that people's exploration and research into the objective world are endless.