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Дата изменения: Sat Oct 14 21:04:11 2000 Дата индексирования: Mon Oct 1 22:20:35 2012 Кодировка: Поисковые слова: earth's atmosphere |
Quantum clock (atomic clock) - the time measuring device containing quartz generator, controlled by the quantum frequency standard. Atoms play a role of pendulum. The frequency of atoms radiation while the atoms passing from one energy level to another regulates the quantum clock. This frequency is so stable (error 10^-11 - 10^-13) that quantum clocks allow to calculate the time more exactly, then astronomic methods.