GK
PHYSICS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The period of rotation and revolution are equal
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Only one part reflects light
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It does not rotate
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None of these
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Detailed explanation-1: -The time period to complete one rotation on its own axis is equal to the time taken to complete one revolution around Earth. This makes the Moon tidally locked, i.e., the part of the Moon visible from Earth remains the same. Hence we are able to see only one side of the Moon.
Detailed explanation-2: -The Moon orbits Earth once every 27.3 days and spins on its axis once every 27.3 days. This means that although the Moon is rotating, it always keeps one face toward us. Known as “synchronous rotation, ‘’ this is why we only ever see the Moon’s nearside from Earth.
Detailed explanation-3: -It’s just spinning at exactly the same rate as its orbit – one revolution every 27 days. Effectively, its day is as long as its year. This is no coincidence. It’s called ‘synchronous rotation’ and is a result of the gravitational tug of war between the Earth and the Moon.
Detailed explanation-4: -The moon’s time period of rotation is equal to the moon’s time period of revolution which is 27.3 days.
Detailed explanation-5: -The synchronization between the Moon’s orbital period and its rotation period is due to a process tidal locking. The constant pulling back on the Moon acted as a brake, slowing its spin until the rotation period and the orbital period matched.