Dimensionless physical constant

（重定向自Fundamental physical constant）

In physics, a dimensionless physical constant, sometimes called a fundamental physical constant, is a physical constant that is dimensionless. It has no units attached and has a numerical value that is independent of the system of units used. Perhaps the best-known example is the fine-structure constant, α, which has approximate value of ⁄_137.036.

单词	Fundamental physical constant
释义	Fundamental physical constant 英语百科 Dimensionless physical constant （重定向自Fundamental physical constant） In physics, a dimensionless physical constant, sometimes called a fundamental physical constant, is a physical constant that is dimensionless. It has no units attached and has a numerical value that is independent of the system of units used. Perhaps the best-known example is the fine-structure constant, α, which has approximate value of ⁄_137.036.
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