量子是构成物质的最基本单元,能量的最基本携带者,且不可分割。以我们最熟悉的“光量子”为例,作为光能量的最小单元,不存在“半个光子”。光的能量都是以光量子的能量为单位逐份变化的,并且这种变化不是连续的。在量子物理学的理论体系中,大多数物理量的值都是不连续、离散式地变化的。这样的观点在提出之初让人难以接受,因为它与经典物理学中物理量是连续变化的观点截然不同。然而,大量的实验事实让科学家们逐渐接受了这一新的理论。 Quantum is the most basic unit constituting the material, the most basic energy carriers, and inseparable. Taking our most familiar “light quantum ” as an example, there is no “half photon” as the smallest unit of light energy. The energy of light is changed in parts by the energy of the light quantum, and the change is not continuous. In the theoretical system of quantum physics, most of the physical values ​​are discrete and discrete. Such a view was unacceptable at the beginning of the proposal because it differed sharply from the view that the physical quantities in the classical physics are continuously changing. However, a large number of experimental facts allow scientists to gradually accept this new theory.