The duration of the period of 23 hours 56 minutes and 4 seconds is called ____________.
A
Solar day
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B
Lunar day
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C
Sidereal day
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D
Apparent day
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Solution
The correct option is C Sidereal day A sidereal day is the time it takes for the Earth to rotate about its axis so that the distant stars appear in the same position in the sky. The sidereal day is the time it takes for the Earth to complete one rotation about its axis with respect to the 'fixed' stars. Its duration of period is of 23 hours 56 minutes and 4 seconds .