# Resolve RDF Terms

unit:PlanckTime
http://qudt.org/vocab/unit/PlanckTime

### Namespace

http://qudt.org/vocab/unit/

### Recommended prefix

unit:

lang:en
Planck Time
lang:""
In physics, the Planck time, denoted by $$t_P$$, is the unit of time in the system of natural units known as Planck units. It is the time required for light to travel, in a vacuum, a distance of 1 Planck length. The unit is named after Max Planck, who was the first to propose it. $$\\ t_P \equiv \sqrt{\frac{\hbar G}{c^5}} \approx 5.39106(32) \times 10^{-44} s$$ where, $$c$$ is the speed of light in a vacuum, $$\hbar$$ is the reduced Planck's constant (defined as $$\hbar = \frac{h}{2 \pi}$$ and $$G$$ is the gravitational constant. The two digits between parentheses denote the standard error of the estimated value.
lang:""
0.0000000000000000000000000000000000000000000539124
lang:""
http://dbpedia.org/resource/Planck_time
lang:""
https://en.wikipedia.org/wiki/Planck_units
lang:""
http://en.wikipedia.org/wiki/Planck_time?oldid=495362103
lang:""
$$t_P$$