unit:PlanckLength

Type
Description

In physics, the Planck length, denoted $$\ell_P$$, is a unit of length, equal to $$1.616199(97)×10^{-35}$$ metres. It is a base unit in the system of Planck units. The Planck length can be defined from three fundamental physical constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant.

Properties
0.00000000000000000000000000000000001616252
$$\ell_P = \sqrt{\frac{ \hbar G}{c^3}} \approx 1.616199(97)) \times 10^{-35} m$$, where $$c$$ is the speed of light in a vacuum, $$\hbar$$ is the reduced Planck's constant, and $$G$$ is the gravitational constant. The two digits enclosed by parentheses are the estimated standard error associated with the reported numerical value.
$$\ell_P$$
Annotations
In physics, the Planck length, denoted $$\ell_P$$, is a unit of length, equal to $$1.616199(97)×10^{-35}$$ metres. It is a base unit in the system of Planck units. The Planck length can be defined from three fundamental physical constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant.
Planck Length(en)

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