Universal time is based on A. rotation of the earth on its axis. B. Earth’s orbital motion around the Sun. C. vibrations of cesium atom. D. oscillations of quartz crystal.
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B is the answer.
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Answer:
A. rotation of the earth on its axis.
Explanation:
Universal time , i.e UTC is based on the earth rotation on its axis .
This is the standard measure of time and is the improvement of the Greenwich mean time .
N/B This are the standards to which the world regulates its time .
UTC is regulated by the international telecommunication union , whereby they control Standard-frequency and time-signal emissions Standard-frequency and time-signal emissions.
With this time around the world is represented using positive and negative offsets e.g +12 UTC OR - 12 UTC.
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