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Toshkent farmatsevtika instituti fizika, matematika va axborot texnologiyalari kafedrasi
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| bet | 53/69 | | Sana | 19.03.2017 | | Hajmi | 172,07 Kb. | | #410 |
Planck Constant:
The proportionality constant (h) which provides the relation between the energy (E) of a photon and the frequency (v) of its associated electromagnetic wave in the so-called Planck Relation E = hv. It is essentially used to describe the sizes of individual quanta in quantum mechanics. Its value depends on the units used for energy and frequency, but it is a very small number (with energy measured in Joules, it is of the order of 6.626 CH 10-34 J·s).
Planck Energy:
The super-high energy (approximately 1.22 CH 1019 GeV) at which gravity becomes comparable in strength to the other fundamental forces, and at which the quantum effects of gravity become important.
Planck Length:
The fantastically tiny length scale (approximately 1.6 CH 10-35 metres) at which gravity becomes comparable in strength to the other fundamental forces. It is the scale at which classical ideas aboutgravity and space-time cease to be valid, and quantum effects dominate.
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