In quantum mechanics, the Planck Time (tₚ) is the unit of time in the system of natural units knowns as Planck Units. A Planck time unit is the time required for the light to travel a distance of one Planck length in a vacuum. The Planck time is defined by using the universal physical constants as below :
tₚ = √((h×G)/c⁵),
which is a time interval of approximate equivalent value in terms of SI units, the seconds is :
1 tₚ ≅ 5.391247 × 10⁻⁴⁴ s
1 tₚ ≅ 5.391247 × 10⁻⁴⁴ s
The Planck time was first suggested by Max Planck in 1899. The Planck time is the unique combination of the gravitational constant G, the speed of light c and the Planck's constant h, to produce a constant with dimension of time. The reciprocal of the Planck time is the Planck frequency which can be interpreted as an upper bound on the frequency of a wave. This follows from the interpretation of the Planck length as a minimal length, and hence a lower bound on the wavelength.
νₚ = 1/tₚ = c/ℓₚ ≅ 1.856 × 10⁴³ Hz
νₚ = 1/tₚ = c/ℓₚ ≅ 1.856 × 10⁴³ Hz
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