Planck length


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Planck length

[′pläŋk ‚leŋkth]
(physics)
The length √(Gh /2π c 3) (where G is the gravitational constant, h is Planck's constant, and c is the speed of light) at which quantum fluctuations are believed to dominate the geometry of space-time; it is equal to 1.6162 × 10-35 m.
References in periodicals archive ?
And if the Saudi bailout was the geopolitical manifestation of one Planck length, Islamabad is looking for a few more of those, especially in the UAE and China.
The weavers transcribed Faig Ahmad's subconscious creation inspired by his reading about Planck length (the smallest possible length that equals to 1.616229(38)1035 meters calculated using three fundamental constants) into geometric patters of a carpet.
The presence of a quantum gravity on quantum mechanics has the consequence of the existence of a minimal observable distance on the order of the Planck length. Therefore the Heisenberg uncertainty principle gets additional correction due to the presence of a quantum gravity, which is well known as Generalized Uncertainty Principle (GUP) [10,11], given by
Nevertheless, in 1926 the Swedish physicist, Oskar Klein, calculated that the size of one of these dimensions could be no larger than [10.sup.-30] cm, slightly above the Planck length length limit of [10.sup.-33] cm (Klein 1991, 110).
The magnitudes of r, and m, are equal to the Planck length and mass respectively [4, p.
Second, it seems quantum gravity is needed to complete the standard cosmological models, since cosmological perturbations that we see in cosmic structure today started out with wavelengths smaller than the Planck length before inflation, where quantum gravity cannot be ignored.
Bolstered by the evidence garnered from the three photons, Nemiroff's analysis supports earlier indications but takes them clearly below the Planck length.
Another problem, he says, is that inflation requires density fluctuations in the infant universe to have wavelengths smaller than the Planck length, below which regular notions about space break down.
Under Planck tension, with participating sub-Planck fluctuations, informon string may be squeezed to a size lesser than Planck length, i.e.
Quantum of space having the size of Planck length and vibrating at certain frequencies are the basic "packets of energy" that build up matter and a-temporal physical space.
There is an ultimate length scale, the Planck length, below which space-time may just not be defined.