物理学中的时空对称性和守恒定律

Symmetry and Conservation Laws in Physics

对称性意味着不变性,也就是经过某种对称变换后物理规律的不变性,这就意味着某种物理量的守恒.力学的守恒定律是时间的均匀性、空间的均匀性和各向同性的具体表现.从对称性角度探索问题,可以对未知的物理规律加以发现.

symmetry means invariance after some kind of symmetry transform. This means the conservation of some physical quantities. The conservation law of mechanics is the the manifestation on the uniformity of time, space, and isotropic. Exploring the problems from the view of symmetry,we could find on the