Question
Which of the following are used for accurately
measuring very small time intervals?Solution
Anatomicclockisaclockdevice thatusesanelectronictransitionfrequencyinthe microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element. Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequencyoftelevisionbroadcasts,andinglobal navigation satellite systems such as GPS.
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