Амонячен часовник [Technology Category:
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“Амонячният часовник е атомен часовник, чието действие се основава на честотата на трептене, с която азотният атом в молекулата на амоняка преминава през равнината на трите водородни атома и се връща обратно. Трептенето е с честота 23870 херца, като за доставяне на енергия с тази честота се използва кварцов кристал. Тъй като амонякът поглъща енергия само при тази честота, той служи за регулиране на честотата на кварцовия осцилатор чрез верига за обратна връзка. …” (Wikipedia) (Wikipedia translated)
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