What is the length of a lunar day?

The length of a lunar day is approximately 29.5 Earth days, which means it takes about that long for the Moon to complete one full rotation on its axis relative to the Sun. However, when considering a single rotation of the Moon in relation to Earth, it translates to about 24 hours and 50 minutes. This figure is significant because it reflects the time it takes for a specific point on the lunar surface to experience a full cycle of sunlight and darkness, or day and night.

In this context, the correct option accurately represents the unique rotational dynamics of the Moon compared to Earth. The lunar day is actually longer than a typical Earth day, which can be a common point of confusion. Understanding this concept is important in fields such as astronomy and space exploration.