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单词 Mach’s principle
释义
Mach’s principle

Physics
  • The inertia of any particular piece of matter is attributable to the interaction between that piece of matter and the rest of the universe. A body in isolation would have zero inertia. This principle was stated by Ernst Mach in the 1870s and was made use of by Einstein in his general theory of relativity. The significance of Mach’s principle in general relativity theory and the foundations of physics continues to be a contentious issue.


Astronomy
  • The proposal that the inertial mass of a particle is determined by the gravitational effect of all the other matter in the Universe. Hence the concept of mass would be meaningless in an empty universe. The principle is named after the Austrian physicist Ernst Mach (1838–1916). A. Einstein was influenced by Mach’s principle, but his theory of general relativity failed to incorporate it. Many theorists have sought to remedy this failing, but with only limited success.


Philosophy
  • The physical principle that the inertia of a body in a system is determined by the distribution of mass and energy in the rest of the system.


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