Two basic components are exhibited in two ways:Ī means of keeping track of increment of ways of displaying the results or increment of time.Ī regular, repetitive or constant action to mark of equal increment of time.īased on the rotation of the earth the oldest and the most used method of measuring time is based due to which day and night occurs. Time can be measured in many ways by using a simple pendulum, atomic clock or stopwatch.
In our daily use we use the 12 hour time system whereas airlines and railways use the 24 hours clock system. Periodic events are defined as the events which repeat after the same and equal interval of times motion of sewing needle of machine and bob of simple pendulum are few of the examples. Chronology is defined as science of arranging events in sequence or order of occurrence in time, and is mainly used for studying the paste time or the history. The science and study of time measurement is known as horology or chronometry. Time is defined as the interval between two events. The atomic clocks operation principle is based on atomic physics, it measures the electromagnetic signals that electrons in atoms emit when they change energy level.
#Atomic time keeping tv
It is there to control the wave frequency of tv broadcasts, and in global navigation in the satellite system. The atomic clock shows the most accurate time and frequency standard known and are used as the primary standard for international time distribution service. A device that uses a hyperfine transition frequency in microwave or electron transition frequency in the optical or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element is known as atomic clock.
0 kommentar(er)
