The question tests knowledge of astronomical and geophysical time periods. The sidereal day is distinct from the solar day (24 hours), which is the time it takes for the Sun to appear in the same position in the sky.
The significance of 23 hr 56 min 4.09 sec is the exact time taken by our moon to
Asked in ASSISTANT ENGINEER(ELECTRICAL) 2016 · Topic: The Earth (Earth's Movements: Rotation, Revolution, their effects)
More World and Physical Geography questions
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