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
Famous quotes containing the word time:
“The techniques of opening conversation are universal. I knew long ago and rediscovered that the best way to attract attention, help, and conversation is to be lost. A man who seeing his mother starving to death on a path kicks her in the stomach to clear the way, will cheerfully devote several hours of his time giving wrong directions to a total stranger who claims to be lost.”
—John Steinbeck (1902–1968)