In physics, the Planck time, (tP), 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.
The Planck time is defined as:
- ≈ 5.39106(32) × 10−44 s
where:
- is the reduced Planck constant (sometimes is used instead of in the definition)
- G = gravitational constant
- c = speed of light in a vacuum
- s is the SI unit of time, the second.
The two digits between parentheses denote the standard error of the estimated value.
Read more about Planck Time: Physical Significance
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