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Q. |
We always see the same lace of the moon, because – |
A. | It is smaller than the earth |
B. | It revolves on its axis in a direction opposite to that of the earth |
C. | It takes equal time for revolution around the earth and rotation on its own axis |
D. | It rotates at the same speed as the earth around the sun |
Answer» C. It takes equal time for revolution around the earth and rotation on its own axis | |
Explanation: It is tidal locking that causes the synchronous rotation which causes the Moon to present "just one side" to the Earth all the time. The Moon rotates (spins) but very slowly, making one turn on its axis in the same time it takes to revolve (orbit) around the Earth. So it maintains a "constant face" in our direction. |
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