Chapter 32, Problem 14TE

If you were on Moon and you looked up and saw a full Earth, would it be nighttime or daytime on the Moon?

To determine

Whether it would be day or night on Moon when a person saw a full Earth from moon.

Answer to Problem 14TE

It was the night time when a person saw full Earth from the Moon.

Explanation of Solution

Moon rotates about its axis and it also revolves around Earth, so it takes one month to complete its one rotation and one round around the Earth. The rotational speed of the Moon is very slow, that is the reason why we always see the one face of the Moon. If we are on the near side of the Moon, we can see the Earth all time.

We can see full Earth from Moon when it bright, and the Earth appears bright at night because in this condition moon gets located between the sun and Earth shines by the reflection of light.

Conclusion:

Therefore, it is the night time when we see full Earth from the Moon.