相对论质量

 

https://zh.wikipedia.org/wiki/狭义相对论

牛顿力学是狭义相对论在低速情况下的近似。

https://en.wikipedia.org/wiki/Special_relativity

In physics, special relativity (SR, also known as the special theory of relativity or STR) is the generally accepted and experimentally well-confirmed physical theory regarding the relationship between space and time。