物理学试图描述各种自然现象——从宇宙的演化到比热与温度的关系乃至β衰变。从历史上看,物理学一直是从观察(天文学)或者物理学家所进行的实验中得到的一些经验关系。此后对提出的模型或假说进行检验,并将那些与实际符合得最好的模型和假说传留下来。如果说物理学开始于阿基米德时代,那么,现有的理论和模型乃是两千多年以来许多 Physics tries to describe various natural phenomena - from the evolution of the universe to the relationship between specific heat and temperature and even β decay. Historically, physics has been some empirical relationship gained from observations (astronomy) or experiments conducted by physicists. Afterwards, the proposed model or hypothesis is tested and the models and hypotheses that best fit the reality are left behind. If physics began in the Archimedes era, then the existing theories and models have been many since more than two thousand years